/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:17:13,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:17:13,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:17:13,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:17:13,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:17:13,938 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:17:13,940 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:17:13,944 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:17:13,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:17:13,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:17:13,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:17:13,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:17:13,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:17:13,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:17:13,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:17:13,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:17:13,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:17:13,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:17:13,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:17:13,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:17:13,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:17:13,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:17:13,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:17:13,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:17:13,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 18:17:13,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:17:13,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:17:13,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:17:13,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 18:17:14,008 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:17:14,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:17:14,009 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:17:14,009 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:17:14,010 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:17:14,011 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:17:14,011 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:17:14,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:17:14,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:17:14,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:17:14,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:17:14,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:17:14,013 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:17:14,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:17:14,014 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:17:14,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:17:14,304 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:17:14,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:17:14,307 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:17:14,308 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:17:14,309 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-05 18:17:14,369 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebf3a3b3/625a3badf8994a8b9353e6e3cdbabed3/FLAGea13b5ccb [2021-06-05 18:17:14,788 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:17:14,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-06-05 18:17:14,802 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebf3a3b3/625a3badf8994a8b9353e6e3cdbabed3/FLAGea13b5ccb [2021-06-05 18:17:14,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ebf3a3b3/625a3badf8994a8b9353e6e3cdbabed3 [2021-06-05 18:17:14,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:17:14,825 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:17:14,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:17:14,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:17:14,830 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:17:14,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:17:14" (1/1) ... [2021-06-05 18:17:14,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b54c0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:14, skipping insertion in model container [2021-06-05 18:17:14,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:17:14" (1/1) ... [2021-06-05 18:17:14,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:17:14,872 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:17:15,161 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-06-05 18:17:15,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:17:15,169 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:17:15,204 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-06-05 18:17:15,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:17:15,249 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:17:15,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15 WrapperNode [2021-06-05 18:17:15,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:17:15,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:17:15,251 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:17:15,251 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:17:15,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,279 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:17:15,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:17:15,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:17:15,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:17:15,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,300 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,304 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (1/1) ... [2021-06-05 18:17:15,309 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:17:15,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:17:15,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:17:15,310 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:17:15,310 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (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 [2021-06-05 18:17:15,361 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:17:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:17:15,361 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:17:15,361 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:17:15,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:17:15,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:17:15,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:17:15,364 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 18:17:15,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:17:15,599 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 18:17:15,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:17:15 BoogieIcfgContainer [2021-06-05 18:17:15,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:17:15,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:17:15,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:17:15,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:17:15,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:17:14" (1/3) ... [2021-06-05 18:17:15,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53daf082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:17:15, skipping insertion in model container [2021-06-05 18:17:15,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:15" (2/3) ... [2021-06-05 18:17:15,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53daf082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:17:15, skipping insertion in model container [2021-06-05 18:17:15,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:17:15" (3/3) ... [2021-06-05 18:17:15,605 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-06-05 18:17:15,614 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:17:15,614 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:17:15,615 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 18:17:15,615 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,639 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,642 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,644 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,645 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,645 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,646 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,649 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,649 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,658 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:15,660 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 18:17:15,674 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 18:17:15,695 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:17:15,695 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:17:15,695 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:17:15,695 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:17:15,695 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:17:15,695 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:17:15,695 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:17:15,695 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:17:15,703 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 18:17:15,769 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:15,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 18:17:15,785 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:15,786 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:15,786 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 18:17:15,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:15,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425169083] [2021-06-05 18:17:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:16,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:16,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425169083] [2021-06-05 18:17:16,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425169083] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:16,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:16,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:17:16,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370387766] [2021-06-05 18:17:16,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:17:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:16,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:17:16,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:17:16,123 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:16,278 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-06-05 18:17:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 18:17:16,280 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 18:17:16,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:16,295 INFO L225 Difference]: With dead ends: 3294 [2021-06-05 18:17:16,295 INFO L226 Difference]: Without dead ends: 1248 [2021-06-05 18:17:16,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-06-05 18:17:16,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-06-05 18:17:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 18:17:16,408 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-06-05 18:17:16,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:16,408 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 18:17:16,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,409 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 18:17:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:17:16,411 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:16,411 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:16,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:17:16,411 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:16,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:16,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 18:17:16,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:16,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230607934] [2021-06-05 18:17:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:16,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:16,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230607934] [2021-06-05 18:17:16,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230607934] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:16,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:16,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:17:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29847556] [2021-06-05 18:17:16,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:17:16,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:17:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:17:16,516 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:16,591 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 18:17:16,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:17:16,592 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 18:17:16,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:16,595 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 18:17:16,595 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 18:17:16,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 18:17:16,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 18:17:16,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 18:17:16,622 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 18:17:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:16,623 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 18:17:16,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 18:17:16,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:16,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:16,625 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:16,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:17:16,625 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:16,626 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-05 18:17:16,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:16,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463706210] [2021-06-05 18:17:16,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:16,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:16,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463706210] [2021-06-05 18:17:16,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463706210] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:16,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:16,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:16,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564923214] [2021-06-05 18:17:16,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:16,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:16,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:16,708 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:16,777 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-06-05 18:17:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:17:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:17:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:16,782 INFO L225 Difference]: With dead ends: 1332 [2021-06-05 18:17:16,782 INFO L226 Difference]: Without dead ends: 1072 [2021-06-05 18:17:16,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-06-05 18:17:16,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-06-05 18:17:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 18:17:16,802 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 18:17:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:16,803 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 18:17:16,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 18:17:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:16,804 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:16,804 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:16,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:17:16,804 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-05 18:17:16,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:16,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706928118] [2021-06-05 18:17:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:16,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:16,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:16,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706928118] [2021-06-05 18:17:16,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706928118] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:16,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:16,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 18:17:16,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077648643] [2021-06-05 18:17:16,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:17:16,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:17:16,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:17:16,906 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:16,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:16,994 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 18:17:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:17:16,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:17:16,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:17,002 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 18:17:17,003 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 18:17:17,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.5ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 18:17:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 18:17:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 18:17:17,025 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 18:17:17,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:17,026 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 18:17:17,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,027 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 18:17:17,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:17,028 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:17,028 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:17,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:17:17,028 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:17,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:17,028 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-05 18:17:17,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:17,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395516508] [2021-06-05 18:17:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:17,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:17,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395516508] [2021-06-05 18:17:17,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395516508] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:17,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:17,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:17,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647594417] [2021-06-05 18:17:17,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:17,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:17,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:17,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:17,106 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:17,196 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 18:17:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:17:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:17:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:17,203 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 18:17:17,204 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 18:17:17,204 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 18:17:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 18:17:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 18:17:17,233 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 18:17:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:17,233 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 18:17:17,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 18:17:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:17,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:17,235 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:17,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:17:17,235 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:17,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:17,235 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-05 18:17:17,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:17,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026459047] [2021-06-05 18:17:17,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:17,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:17,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026459047] [2021-06-05 18:17:17,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026459047] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:17,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:17,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:17,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679812215] [2021-06-05 18:17:17,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:17,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:17,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:17,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:17,316 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:17,425 INFO L93 Difference]: Finished difference Result 1671 states and 4527 transitions. [2021-06-05 18:17:17,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:17:17,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 18:17:17,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:17,430 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 18:17:17,431 INFO L226 Difference]: Without dead ends: 1173 [2021-06-05 18:17:17,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:17,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-06-05 18:17:17,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-06-05 18:17:17,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-06-05 18:17:17,450 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-06-05 18:17:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:17,450 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-06-05 18:17:17,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-06-05 18:17:17,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:17,451 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:17,451 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:17,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:17:17,452 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:17,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:17,452 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-05 18:17:17,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:17,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544903320] [2021-06-05 18:17:17,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:17,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:17,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:17,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544903320] [2021-06-05 18:17:17,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544903320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:17,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86133326] [2021-06-05 18:17:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 18:17:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:17,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:17:17,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:17,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86133326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:17,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:17,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:17:17,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701149652] [2021-06-05 18:17:17,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:17,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:17,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:17,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:17,849 INFO L87 Difference]: Start difference. First operand 922 states and 2517 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:18,010 INFO L93 Difference]: Finished difference Result 1526 states and 4027 transitions. [2021-06-05 18:17:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:17:18,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:17:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:18,016 INFO L225 Difference]: With dead ends: 1526 [2021-06-05 18:17:18,017 INFO L226 Difference]: Without dead ends: 1256 [2021-06-05 18:17:18,017 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-06-05 18:17:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-06-05 18:17:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-06-05 18:17:18,048 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-06-05 18:17:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:18,049 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-06-05 18:17:18,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-06-05 18:17:18,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:18,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:18,051 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:18,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 18:17:18,265 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-05 18:17:18,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:18,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507685863] [2021-06-05 18:17:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:18,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:18,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:18,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507685863] [2021-06-05 18:17:18,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507685863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:18,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127206864] [2021-06-05 18:17:18,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:18,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:18,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:17:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:18,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:18,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127206864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:18,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:18,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 18:17:18,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093410767] [2021-06-05 18:17:18,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:18,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:18,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:18,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:18,464 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:18,577 INFO L93 Difference]: Finished difference Result 2408 states and 6431 transitions. [2021-06-05 18:17:18,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:17:18,578 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:17:18,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:18,585 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 18:17:18,585 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 18:17:18,585 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 18:17:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-06-05 18:17:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-06-05 18:17:18,617 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-06-05 18:17:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:18,617 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-06-05 18:17:18,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-06-05 18:17:18,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:18,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:18,618 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:18,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:18,835 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:18,835 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-05 18:17:18,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:18,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158947284] [2021-06-05 18:17:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:18,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158947284] [2021-06-05 18:17:18,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158947284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:18,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510166911] [2021-06-05 18:17:18,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:18,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:17:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:17:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:19,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510166911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:19,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:19,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:17:19,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490550001] [2021-06-05 18:17:19,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:19,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:19,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:19,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:19,022 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:19,252 INFO L93 Difference]: Finished difference Result 2196 states and 5861 transitions. [2021-06-05 18:17:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 18:17:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:19,257 INFO L225 Difference]: With dead ends: 2196 [2021-06-05 18:17:19,258 INFO L226 Difference]: Without dead ends: 1621 [2021-06-05 18:17:19,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:17:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-06-05 18:17:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-06-05 18:17:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-06-05 18:17:19,282 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-06-05 18:17:19,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:19,282 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-06-05 18:17:19,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-06-05 18:17:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:17:19,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:19,284 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:19,493 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1925374875, now seen corresponding path program 1 times [2021-06-05 18:17:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096178457] [2021-06-05 18:17:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:19,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:19,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096178457] [2021-06-05 18:17:19,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096178457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:19,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219177638] [2021-06-05 18:17:19,581 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 18:17:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:19,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:19,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219177638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:19,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:19,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:17:19,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548574329] [2021-06-05 18:17:19,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:19,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:19,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:19,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:19,780 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:19,916 INFO L93 Difference]: Finished difference Result 2068 states and 5483 transitions. [2021-06-05 18:17:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:17:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:19,922 INFO L225 Difference]: With dead ends: 2068 [2021-06-05 18:17:19,922 INFO L226 Difference]: Without dead ends: 1734 [2021-06-05 18:17:19,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:17:19,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-06-05 18:17:19,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-06-05 18:17:19,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-06-05 18:17:19,948 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-06-05 18:17:19,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:19,948 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-06-05 18:17:19,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-06-05 18:17:19,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:17:19,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:19,950 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:20,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:20,166 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:20,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:20,166 INFO L82 PathProgramCache]: Analyzing trace with hash -558025153, now seen corresponding path program 2 times [2021-06-05 18:17:20,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:20,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324124130] [2021-06-05 18:17:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:20,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324124130] [2021-06-05 18:17:20,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324124130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:20,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340346395] [2021-06-05 18:17:20,216 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 [2021-06-05 18:17:20,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:20,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:20,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340346395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:20,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:20,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:17:20,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393408471] [2021-06-05 18:17:20,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:20,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:20,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:20,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:20,337 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:20,426 INFO L93 Difference]: Finished difference Result 2061 states and 5277 transitions. [2021-06-05 18:17:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:17:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:17:20,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:20,443 INFO L225 Difference]: With dead ends: 2061 [2021-06-05 18:17:20,444 INFO L226 Difference]: Without dead ends: 1791 [2021-06-05 18:17:20,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-06-05 18:17:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-06-05 18:17:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-06-05 18:17:20,477 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-06-05 18:17:20,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:20,493 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-06-05 18:17:20,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-06-05 18:17:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:17:20,496 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:20,496 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:20,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 18:17:20,709 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash -128271569, now seen corresponding path program 3 times [2021-06-05 18:17:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:20,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837418468] [2021-06-05 18:17:20,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:20,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837418468] [2021-06-05 18:17:20,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837418468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:20,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726258951] [2021-06-05 18:17:20,763 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 [2021-06-05 18:17:20,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:17:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:20,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:20,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726258951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:20,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:20,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:17:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748699273] [2021-06-05 18:17:20,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:20,921 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:21,068 INFO L93 Difference]: Finished difference Result 2006 states and 5197 transitions. [2021-06-05 18:17:21,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:17:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:21,071 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 18:17:21,072 INFO L226 Difference]: Without dead ends: 1736 [2021-06-05 18:17:21,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:17:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-06-05 18:17:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-06-05 18:17:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-06-05 18:17:21,095 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-06-05 18:17:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:21,095 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-06-05 18:17:21,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-06-05 18:17:21,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:17:21,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:21,097 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:21,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:21,315 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -186005699, now seen corresponding path program 4 times [2021-06-05 18:17:21,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:21,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935576289] [2021-06-05 18:17:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:21,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:21,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935576289] [2021-06-05 18:17:21,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935576289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:21,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754651290] [2021-06-05 18:17:21,367 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 [2021-06-05 18:17:21,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:21,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:21,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:21,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754651290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:21,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:21,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:17:21,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916668797] [2021-06-05 18:17:21,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:21,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:21,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:21,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:21,492 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:21,608 INFO L93 Difference]: Finished difference Result 2798 states and 7421 transitions. [2021-06-05 18:17:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:17:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:17:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:21,612 INFO L225 Difference]: With dead ends: 2798 [2021-06-05 18:17:21,613 INFO L226 Difference]: Without dead ends: 2528 [2021-06-05 18:17:21,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-06-05 18:17:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-06-05 18:17:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-06-05 18:17:21,642 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-06-05 18:17:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:21,642 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-06-05 18:17:21,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:21,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-06-05 18:17:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 18:17:21,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:21,644 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:21,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:21,861 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -163662449, now seen corresponding path program 5 times [2021-06-05 18:17:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:21,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456203449] [2021-06-05 18:17:21,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:21,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:21,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456203449] [2021-06-05 18:17:21,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456203449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:21,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704050756] [2021-06-05 18:17:21,933 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 [2021-06-05 18:17:22,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 18:17:22,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:22,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:22,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:22,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704050756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:22,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:22,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:17:22,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456781588] [2021-06-05 18:17:22,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:22,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:22,090 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:22,268 INFO L93 Difference]: Finished difference Result 2285 states and 6121 transitions. [2021-06-05 18:17:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:17:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 18:17:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:22,271 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 18:17:22,271 INFO L226 Difference]: Without dead ends: 1706 [2021-06-05 18:17:22,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:17:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-06-05 18:17:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-06-05 18:17:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-06-05 18:17:22,294 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-06-05 18:17:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:22,294 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-06-05 18:17:22,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-06-05 18:17:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:22,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:22,296 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:22,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 18:17:22,513 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 6 times [2021-06-05 18:17:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:22,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199463056] [2021-06-05 18:17:22,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:22,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:22,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199463056] [2021-06-05 18:17:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199463056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:22,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308987466] [2021-06-05 18:17:22,569 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 [2021-06-05 18:17:22,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 18:17:22,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:22,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:22,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:22,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308987466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:22,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:22,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:17:22,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7680523] [2021-06-05 18:17:22,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:17:22,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:22,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:17:22,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:22,726 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:22,857 INFO L93 Difference]: Finished difference Result 1931 states and 5017 transitions. [2021-06-05 18:17:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:17:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:22,860 INFO L225 Difference]: With dead ends: 1931 [2021-06-05 18:17:22,860 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 18:17:22,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:22,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 18:17:22,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-06-05 18:17:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-06-05 18:17:22,881 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-06-05 18:17:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:22,881 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-06-05 18:17:22,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:22,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-06-05 18:17:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:22,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:22,883 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:23,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:17:23,104 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:23,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 7 times [2021-06-05 18:17:23,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:23,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561426792] [2021-06-05 18:17:23,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:23,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561426792] [2021-06-05 18:17:23,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561426792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:23,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432044068] [2021-06-05 18:17:23,169 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 [2021-06-05 18:17:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:23,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432044068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:23,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:23,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:17:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701413436] [2021-06-05 18:17:23,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:23,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:23,354 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:23,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:23,535 INFO L93 Difference]: Finished difference Result 2111 states and 5497 transitions. [2021-06-05 18:17:23,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:23,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:17:23,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:23,538 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 18:17:23,538 INFO L226 Difference]: Without dead ends: 1841 [2021-06-05 18:17:23,539 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:23,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-06-05 18:17:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-06-05 18:17:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:23,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-06-05 18:17:23,564 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-06-05 18:17:23,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:23,564 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-06-05 18:17:23,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:23,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-06-05 18:17:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:23,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:23,566 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:23,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:17:23,785 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:23,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 8 times [2021-06-05 18:17:23,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:23,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785218840] [2021-06-05 18:17:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:23,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:23,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785218840] [2021-06-05 18:17:23,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785218840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:23,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686323693] [2021-06-05 18:17:23,840 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 [2021-06-05 18:17:23,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:23,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:23,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686323693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:23,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:23,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:17:23,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814419615] [2021-06-05 18:17:23,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:17:23,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:17:23,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:23,975 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:24,151 INFO L93 Difference]: Finished difference Result 2858 states and 7631 transitions. [2021-06-05 18:17:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:24,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:17:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:24,155 INFO L225 Difference]: With dead ends: 2858 [2021-06-05 18:17:24,156 INFO L226 Difference]: Without dead ends: 2588 [2021-06-05 18:17:24,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 129.9ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:17:24,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-06-05 18:17:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-06-05 18:17:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-06-05 18:17:24,184 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-06-05 18:17:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:24,184 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-06-05 18:17:24,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-06-05 18:17:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:24,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:24,186 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:24,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:17:24,401 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:24,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:24,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 9 times [2021-06-05 18:17:24,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:24,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280960893] [2021-06-05 18:17:24,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:24,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:24,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280960893] [2021-06-05 18:17:24,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280960893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:24,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094566762] [2021-06-05 18:17:24,450 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 [2021-06-05 18:17:24,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:17:24,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:24,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:24,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:24,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:24,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094566762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:24,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:24,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:17:24,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174702701] [2021-06-05 18:17:24,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:17:24,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:24,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:17:24,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:24,575 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:24,837 INFO L93 Difference]: Finished difference Result 2320 states and 6281 transitions. [2021-06-05 18:17:24,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:24,838 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-06-05 18:17:24,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:24,840 INFO L225 Difference]: With dead ends: 2320 [2021-06-05 18:17:24,840 INFO L226 Difference]: Without dead ends: 1831 [2021-06-05 18:17:24,841 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-06-05 18:17:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1234. [2021-06-05 18:17:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-06-05 18:17:24,856 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-06-05 18:17:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:24,856 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-06-05 18:17:24,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-06-05 18:17:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:24,858 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:24,858 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:25,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:17:25,075 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:25,075 INFO L82 PathProgramCache]: Analyzing trace with hash -173240564, now seen corresponding path program 10 times [2021-06-05 18:17:25,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:25,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340312246] [2021-06-05 18:17:25,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:25,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:25,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340312246] [2021-06-05 18:17:25,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340312246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:25,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649706900] [2021-06-05 18:17:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-05 18:17:25,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:25,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:25,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649706900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:25,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:25,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 18:17:25,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041403771] [2021-06-05 18:17:25,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:25,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:25,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:25,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:25,322 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:25,519 INFO L93 Difference]: Finished difference Result 2024 states and 5266 transitions. [2021-06-05 18:17:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:25,520 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:25,523 INFO L225 Difference]: With dead ends: 2024 [2021-06-05 18:17:25,523 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 18:17:25,523 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:25,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 18:17:25,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1319. [2021-06-05 18:17:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.6828528072837634) internal successors, (3536), 1318 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:25,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3536 transitions. [2021-06-05 18:17:25,541 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3536 transitions. Word has length 60 [2021-06-05 18:17:25,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:25,541 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 3536 transitions. [2021-06-05 18:17:25,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:25,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3536 transitions. [2021-06-05 18:17:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:25,543 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:25,543 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:25,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:25,757 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -722803536, now seen corresponding path program 11 times [2021-06-05 18:17:25,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:25,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202940643] [2021-06-05 18:17:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:25,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:25,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202940643] [2021-06-05 18:17:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202940643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:25,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580304437] [2021-06-05 18:17:25,816 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 [2021-06-05 18:17:25,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:17:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:26,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580304437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:26,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:26,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:26,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645770018] [2021-06-05 18:17:26,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:26,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:26,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:26,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:26,019 INFO L87 Difference]: Start difference. First operand 1319 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:26,156 INFO L93 Difference]: Finished difference Result 2246 states and 5647 transitions. [2021-06-05 18:17:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:17:26,156 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:26,159 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 18:17:26,159 INFO L226 Difference]: Without dead ends: 1976 [2021-06-05 18:17:26,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:26,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-06-05 18:17:26,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1463. [2021-06-05 18:17:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7038303693570453) internal successors, (3953), 1462 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3953 transitions. [2021-06-05 18:17:26,179 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3953 transitions. Word has length 60 [2021-06-05 18:17:26,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:26,179 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 3953 transitions. [2021-06-05 18:17:26,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3953 transitions. [2021-06-05 18:17:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:26,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:26,181 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:26,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:26,397 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:26,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:26,397 INFO L82 PathProgramCache]: Analyzing trace with hash -790954592, now seen corresponding path program 12 times [2021-06-05 18:17:26,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:26,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5200014] [2021-06-05 18:17:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:26,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:26,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5200014] [2021-06-05 18:17:26,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5200014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:26,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153906161] [2021-06-05 18:17:26,461 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 [2021-06-05 18:17:26,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:17:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:26,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:26,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153906161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:26,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:17:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795123088] [2021-06-05 18:17:26,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:26,621 INFO L87 Difference]: Start difference. First operand 1463 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:26,804 INFO L93 Difference]: Finished difference Result 2206 states and 5642 transitions. [2021-06-05 18:17:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:26,808 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 18:17:26,808 INFO L226 Difference]: Without dead ends: 1936 [2021-06-05 18:17:26,808 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:26,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-06-05 18:17:26,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1538. [2021-06-05 18:17:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.718282368249837) internal successors, (4178), 1537 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4178 transitions. [2021-06-05 18:17:26,828 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4178 transitions. Word has length 60 [2021-06-05 18:17:26,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:26,829 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4178 transitions. [2021-06-05 18:17:26,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4178 transitions. [2021-06-05 18:17:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:26,830 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:26,830 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:27,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:17:27,045 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:27,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:27,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2087923666, now seen corresponding path program 13 times [2021-06-05 18:17:27,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:27,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064854644] [2021-06-05 18:17:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:27,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064854644] [2021-06-05 18:17:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064854644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057012683] [2021-06-05 18:17:27,109 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 [2021-06-05 18:17:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:27,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:27,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057012683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:27,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:27,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142174457] [2021-06-05 18:17:27,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:27,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:27,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:27,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:27,240 INFO L87 Difference]: Start difference. First operand 1538 states and 4178 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:27,387 INFO L93 Difference]: Finished difference Result 2256 states and 5817 transitions. [2021-06-05 18:17:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:17:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:27,389 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 18:17:27,389 INFO L226 Difference]: Without dead ends: 1986 [2021-06-05 18:17:27,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:17:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-06-05 18:17:27,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1613. [2021-06-05 18:17:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.7313895781637716) internal successors, (4403), 1612 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4403 transitions. [2021-06-05 18:17:27,410 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4403 transitions. Word has length 60 [2021-06-05 18:17:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:27,411 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4403 transitions. [2021-06-05 18:17:27,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4403 transitions. [2021-06-05 18:17:27,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:27,413 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:27,413 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:27,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:27,630 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:27,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:27,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1658170082, now seen corresponding path program 14 times [2021-06-05 18:17:27,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:27,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319446187] [2021-06-05 18:17:27,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:27,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:27,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319446187] [2021-06-05 18:17:27,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319446187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738124624] [2021-06-05 18:17:27,692 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 [2021-06-05 18:17:27,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:27,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:27,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:27,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738124624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:27,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:27,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:17:27,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249745401] [2021-06-05 18:17:27,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:27,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:27,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:27,840 INFO L87 Difference]: Start difference. First operand 1613 states and 4403 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:28,088 INFO L93 Difference]: Finished difference Result 2341 states and 6107 transitions. [2021-06-05 18:17:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:28,091 INFO L225 Difference]: With dead ends: 2341 [2021-06-05 18:17:28,091 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 18:17:28,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 18:17:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1688. [2021-06-05 18:17:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.7551867219917012) internal successors, (4648), 1687 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4648 transitions. [2021-06-05 18:17:28,114 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4648 transitions. Word has length 60 [2021-06-05 18:17:28,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:28,115 INFO L482 AbstractCegarLoop]: Abstraction has 1688 states and 4648 transitions. [2021-06-05 18:17:28,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4648 transitions. [2021-06-05 18:17:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:28,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:28,117 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:28,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 18:17:28,329 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:28,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1715904212, now seen corresponding path program 15 times [2021-06-05 18:17:28,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:28,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725308206] [2021-06-05 18:17:28,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:28,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:28,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725308206] [2021-06-05 18:17:28,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725308206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:28,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198692081] [2021-06-05 18:17:28,381 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 [2021-06-05 18:17:28,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:17:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:28,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:28,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198692081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:28,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:28,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:28,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046635643] [2021-06-05 18:17:28,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:28,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:28,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:28,560 INFO L87 Difference]: Start difference. First operand 1688 states and 4648 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:28,720 INFO L93 Difference]: Finished difference Result 3108 states and 8281 transitions. [2021-06-05 18:17:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:28,723 INFO L225 Difference]: With dead ends: 3108 [2021-06-05 18:17:28,723 INFO L226 Difference]: Without dead ends: 2838 [2021-06-05 18:17:28,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-05 18:17:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 1868. [2021-06-05 18:17:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.78896625602571) internal successors, (5207), 1867 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5207 transitions. [2021-06-05 18:17:28,749 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5207 transitions. Word has length 60 [2021-06-05 18:17:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:28,749 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 5207 transitions. [2021-06-05 18:17:28,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5207 transitions. [2021-06-05 18:17:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-06-05 18:17:28,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:28,750 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:28,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:17:28,967 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1693560962, now seen corresponding path program 16 times [2021-06-05 18:17:28,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:28,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143330757] [2021-06-05 18:17:28,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:29,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:29,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:29,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143330757] [2021-06-05 18:17:29,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143330757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:29,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507837715] [2021-06-05 18:17:29,026 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 [2021-06-05 18:17:29,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:29,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:29,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:29,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507837715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:29,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:29,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416107431] [2021-06-05 18:17:29,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:29,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:29,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:29,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:29,159 INFO L87 Difference]: Start difference. First operand 1868 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:29,413 INFO L93 Difference]: Finished difference Result 2595 states and 6981 transitions. [2021-06-05 18:17:29,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:17:29,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-06-05 18:17:29,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:29,416 INFO L225 Difference]: With dead ends: 2595 [2021-06-05 18:17:29,416 INFO L226 Difference]: Without dead ends: 2106 [2021-06-05 18:17:29,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:29,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-06-05 18:17:29,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1513. [2021-06-05 18:17:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.7301587301587302) internal successors, (4128), 1512 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4128 transitions. [2021-06-05 18:17:29,454 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4128 transitions. Word has length 60 [2021-06-05 18:17:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:29,454 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4128 transitions. [2021-06-05 18:17:29,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4128 transitions. [2021-06-05 18:17:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:29,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:29,455 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:29,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 18:17:29,672 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:29,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 17 times [2021-06-05 18:17:29,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:29,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425207126] [2021-06-05 18:17:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:29,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:29,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425207126] [2021-06-05 18:17:29,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425207126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:29,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815065241] [2021-06-05 18:17:29,741 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 [2021-06-05 18:17:29,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:17:29,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:29,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:29,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815065241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:29,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:29,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023877959] [2021-06-05 18:17:29,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:29,909 INFO L87 Difference]: Start difference. First operand 1513 states and 4128 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:30,087 INFO L93 Difference]: Finished difference Result 2231 states and 5767 transitions. [2021-06-05 18:17:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:30,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:30,090 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 18:17:30,090 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 18:17:30,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:30,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 18:17:30,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1588. [2021-06-05 18:17:30,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.742911153119093) internal successors, (4353), 1587 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4353 transitions. [2021-06-05 18:17:30,111 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4353 transitions. Word has length 65 [2021-06-05 18:17:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:30,111 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4353 transitions. [2021-06-05 18:17:30,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4353 transitions. [2021-06-05 18:17:30,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:30,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:30,112 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:30,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:17:30,318 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:30,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:30,319 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 18 times [2021-06-05 18:17:30,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:30,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497654437] [2021-06-05 18:17:30,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:30,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:30,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497654437] [2021-06-05 18:17:30,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497654437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:30,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922428617] [2021-06-05 18:17:30,391 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 [2021-06-05 18:17:30,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:17:30,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:30,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:30,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922428617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:30,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:30,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:30,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118980965] [2021-06-05 18:17:30,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:30,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:30,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:30,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:30,576 INFO L87 Difference]: Start difference. First operand 1588 states and 4353 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:30,798 INFO L93 Difference]: Finished difference Result 2401 states and 6182 transitions. [2021-06-05 18:17:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:30,798 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:30,800 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 18:17:30,800 INFO L226 Difference]: Without dead ends: 2131 [2021-06-05 18:17:30,801 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:30,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-06-05 18:17:30,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1663. [2021-06-05 18:17:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7545126353790614) internal successors, (4578), 1662 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4578 transitions. [2021-06-05 18:17:30,821 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4578 transitions. Word has length 65 [2021-06-05 18:17:30,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:30,821 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4578 transitions. [2021-06-05 18:17:30,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:30,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4578 transitions. [2021-06-05 18:17:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:30,823 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:30,823 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:31,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:17:31,037 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,037 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 19 times [2021-06-05 18:17:31,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318968861] [2021-06-05 18:17:31,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:31,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318968861] [2021-06-05 18:17:31,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318968861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482682316] [2021-06-05 18:17:31,126 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 [2021-06-05 18:17:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:31,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:31,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482682316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:31,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:31,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:31,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701536386] [2021-06-05 18:17:31,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:31,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:31,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:31,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:31,304 INFO L87 Difference]: Start difference. First operand 1663 states and 4578 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:31,516 INFO L93 Difference]: Finished difference Result 2431 states and 6317 transitions. [2021-06-05 18:17:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:17:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:31,518 INFO L225 Difference]: With dead ends: 2431 [2021-06-05 18:17:31,519 INFO L226 Difference]: Without dead ends: 2161 [2021-06-05 18:17:31,519 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:31,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-06-05 18:17:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1738. [2021-06-05 18:17:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.765112262521589) internal successors, (4803), 1737 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4803 transitions. [2021-06-05 18:17:31,545 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4803 transitions. Word has length 65 [2021-06-05 18:17:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:31,545 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4803 transitions. [2021-06-05 18:17:31,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4803 transitions. [2021-06-05 18:17:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:31,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:31,547 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:31,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:31,761 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 20 times [2021-06-05 18:17:31,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715886598] [2021-06-05 18:17:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:31,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715886598] [2021-06-05 18:17:31,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715886598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:31,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203771925] [2021-06-05 18:17:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:31,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:31,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:31,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:32,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203771925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:32,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:32,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455047051] [2021-06-05 18:17:32,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:32,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:32,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:32,002 INFO L87 Difference]: Start difference. First operand 1738 states and 4803 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,262 INFO L93 Difference]: Finished difference Result 2516 states and 6607 transitions. [2021-06-05 18:17:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:32,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:32,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,265 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 18:17:32,265 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 18:17:32,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:17:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 18:17:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1813. [2021-06-05 18:17:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7858719646799117) internal successors, (5048), 1812 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5048 transitions. [2021-06-05 18:17:32,287 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5048 transitions. Word has length 65 [2021-06-05 18:17:32,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,287 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5048 transitions. [2021-06-05 18:17:32,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5048 transitions. [2021-06-05 18:17:32,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:32,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,289 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:32,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:17:32,497 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:32,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 21 times [2021-06-05 18:17:32,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:32,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813541651] [2021-06-05 18:17:32,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:32,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:32,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813541651] [2021-06-05 18:17:32,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813541651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657271853] [2021-06-05 18:17:32,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:32,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:17:32,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:32,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:32,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657271853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:32,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:32,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668048307] [2021-06-05 18:17:32,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:32,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:32,696 INFO L87 Difference]: Start difference. First operand 1813 states and 5048 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,927 INFO L93 Difference]: Finished difference Result 3258 states and 8731 transitions. [2021-06-05 18:17:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,930 INFO L225 Difference]: With dead ends: 3258 [2021-06-05 18:17:32,930 INFO L226 Difference]: Without dead ends: 2988 [2021-06-05 18:17:32,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:17:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-06-05 18:17:32,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1993. [2021-06-05 18:17:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 2.8147590361445785) internal successors, (5607), 1992 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 5607 transitions. [2021-06-05 18:17:32,959 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 5607 transitions. Word has length 65 [2021-06-05 18:17:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,959 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 5607 transitions. [2021-06-05 18:17:32,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 5607 transitions. [2021-06-05 18:17:32,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:32,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,961 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:33,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:33,177 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:33,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:33,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 22 times [2021-06-05 18:17:33,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:33,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914629650] [2021-06-05 18:17:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:33,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:33,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914629650] [2021-06-05 18:17:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914629650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084727702] [2021-06-05 18:17:33,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:33,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:33,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:33,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084727702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:33,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989922373] [2021-06-05 18:17:33,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:33,374 INFO L87 Difference]: Start difference. First operand 1993 states and 5607 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:33,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:33,656 INFO L93 Difference]: Finished difference Result 2720 states and 7381 transitions. [2021-06-05 18:17:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:33,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-05 18:17:33,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:33,659 INFO L225 Difference]: With dead ends: 2720 [2021-06-05 18:17:33,659 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 18:17:33,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:33,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 18:17:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1434. [2021-06-05 18:17:33,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.732728541521284) internal successors, (3916), 1433 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3916 transitions. [2021-06-05 18:17:33,677 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3916 transitions. Word has length 65 [2021-06-05 18:17:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:33,677 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 3916 transitions. [2021-06-05 18:17:33,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:33,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3916 transitions. [2021-06-05 18:17:33,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:33,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:33,679 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:33,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 18:17:33,885 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 632250685, now seen corresponding path program 23 times [2021-06-05 18:17:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736520785] [2021-06-05 18:17:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:33,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:33,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736520785] [2021-06-05 18:17:33,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736520785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747176402] [2021-06-05 18:17:33,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:34,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:17:34,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:34,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:34,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747176402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:34,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:34,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 18:17:34,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584429208] [2021-06-05 18:17:34,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:34,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:34,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:34,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:34,161 INFO L87 Difference]: Start difference. First operand 1434 states and 3916 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:34,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:34,353 INFO L93 Difference]: Finished difference Result 2274 states and 5916 transitions. [2021-06-05 18:17:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:34,356 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 18:17:34,356 INFO L226 Difference]: Without dead ends: 1940 [2021-06-05 18:17:34,356 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:34,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-06-05 18:17:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1519. [2021-06-05 18:17:34,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.691699604743083) internal successors, (4086), 1518 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4086 transitions. [2021-06-05 18:17:34,371 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4086 transitions. Word has length 70 [2021-06-05 18:17:34,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:34,371 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4086 transitions. [2021-06-05 18:17:34,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:34,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4086 transitions. [2021-06-05 18:17:34,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:34,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:34,373 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:34,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:34,581 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -515245599, now seen corresponding path program 24 times [2021-06-05 18:17:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639669260] [2021-06-05 18:17:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:34,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:34,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639669260] [2021-06-05 18:17:34,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639669260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:34,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258274175] [2021-06-05 18:17:34,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:34,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:17:34,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:34,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:34,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258274175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:34,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:34,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:17:34,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133707837] [2021-06-05 18:17:34,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:34,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:34,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:34,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:34,893 INFO L87 Difference]: Start difference. First operand 1519 states and 4086 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:35,054 INFO L93 Difference]: Finished difference Result 2596 states and 6497 transitions. [2021-06-05 18:17:35,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:35,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:35,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:35,057 INFO L225 Difference]: With dead ends: 2596 [2021-06-05 18:17:35,057 INFO L226 Difference]: Without dead ends: 2326 [2021-06-05 18:17:35,057 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-06-05 18:17:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1663. [2021-06-05 18:17:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7093862815884475) internal successors, (4503), 1662 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4503 transitions. [2021-06-05 18:17:35,076 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4503 transitions. Word has length 70 [2021-06-05 18:17:35,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:35,076 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4503 transitions. [2021-06-05 18:17:35,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4503 transitions. [2021-06-05 18:17:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:35,078 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:35,078 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:35,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 18:17:35,293 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:35,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1201428783, now seen corresponding path program 25 times [2021-06-05 18:17:35,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:35,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650016765] [2021-06-05 18:17:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:35,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:35,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:35,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650016765] [2021-06-05 18:17:35,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650016765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:35,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973599846] [2021-06-05 18:17:35,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:35,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:35,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973599846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:35,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:35,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:17:35,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503981228] [2021-06-05 18:17:35,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:35,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:35,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:35,579 INFO L87 Difference]: Start difference. First operand 1663 states and 4503 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:35,810 INFO L93 Difference]: Finished difference Result 2556 states and 6492 transitions. [2021-06-05 18:17:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:35,812 INFO L225 Difference]: With dead ends: 2556 [2021-06-05 18:17:35,812 INFO L226 Difference]: Without dead ends: 2286 [2021-06-05 18:17:35,812 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:17:35,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-06-05 18:17:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1738. [2021-06-05 18:17:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.7219343696027636) internal successors, (4728), 1737 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4728 transitions. [2021-06-05 18:17:35,829 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4728 transitions. Word has length 70 [2021-06-05 18:17:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:35,830 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4728 transitions. [2021-06-05 18:17:35,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4728 transitions. [2021-06-05 18:17:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:35,832 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:35,832 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:36,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:36,037 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1286463521, now seen corresponding path program 26 times [2021-06-05 18:17:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2795185] [2021-06-05 18:17:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:36,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:36,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2795185] [2021-06-05 18:17:36,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2795185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948540856] [2021-06-05 18:17:36,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:36,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:36,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:36,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:36,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:36,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948540856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:36,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:17:36,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516156468] [2021-06-05 18:17:36,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:36,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:36,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:36,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:36,283 INFO L87 Difference]: Start difference. First operand 1738 states and 4728 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:36,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:36,473 INFO L93 Difference]: Finished difference Result 2606 states and 6667 transitions. [2021-06-05 18:17:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:36,475 INFO L225 Difference]: With dead ends: 2606 [2021-06-05 18:17:36,475 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 18:17:36,476 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:36,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 18:17:36,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1813. [2021-06-05 18:17:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7334437086092715) internal successors, (4953), 1812 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 4953 transitions. [2021-06-05 18:17:36,497 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 4953 transitions. Word has length 70 [2021-06-05 18:17:36,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:36,498 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 4953 transitions. [2021-06-05 18:17:36,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 4953 transitions. [2021-06-05 18:17:36,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:36,499 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:36,499 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:36,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:17:36,705 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:36,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:36,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1354614577, now seen corresponding path program 27 times [2021-06-05 18:17:36,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:36,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047410627] [2021-06-05 18:17:36,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:36,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047410627] [2021-06-05 18:17:36,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047410627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763188376] [2021-06-05 18:17:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:36,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:17:36,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:36,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:36,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763188376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:17:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821199535] [2021-06-05 18:17:36,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:36,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:36,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:36,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:36,992 INFO L87 Difference]: Start difference. First operand 1813 states and 4953 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:37,247 INFO L93 Difference]: Finished difference Result 2631 states and 6792 transitions. [2021-06-05 18:17:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:37,250 INFO L225 Difference]: With dead ends: 2631 [2021-06-05 18:17:37,250 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 18:17:37,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 18:17:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1888. [2021-06-05 18:17:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 2.7440381558028615) internal successors, (5178), 1887 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5178 transitions. [2021-06-05 18:17:37,272 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5178 transitions. Word has length 70 [2021-06-05 18:17:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:37,272 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 5178 transitions. [2021-06-05 18:17:37,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5178 transitions. [2021-06-05 18:17:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:37,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:37,274 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:37,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:37,491 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:37,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1643383645, now seen corresponding path program 28 times [2021-06-05 18:17:37,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:37,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775065614] [2021-06-05 18:17:37,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:37,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:37,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775065614] [2021-06-05 18:17:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775065614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149800533] [2021-06-05 18:17:37,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:37,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:37,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:37,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:37,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:37,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149800533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:37,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:17:37,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53531571] [2021-06-05 18:17:37,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:37,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:37,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:37,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:37,734 INFO L87 Difference]: Start difference. First operand 1888 states and 5178 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:37,945 INFO L93 Difference]: Finished difference Result 2656 states and 6917 transitions. [2021-06-05 18:17:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:17:37,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:37,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:37,948 INFO L225 Difference]: With dead ends: 2656 [2021-06-05 18:17:37,948 INFO L226 Difference]: Without dead ends: 2386 [2021-06-05 18:17:37,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:17:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-06-05 18:17:37,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1963. [2021-06-05 18:17:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.753822629969419) internal successors, (5403), 1962 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5403 transitions. [2021-06-05 18:17:37,970 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5403 transitions. Word has length 70 [2021-06-05 18:17:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:37,970 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5403 transitions. [2021-06-05 18:17:37,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5403 transitions. [2021-06-05 18:17:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:37,972 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:37,972 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:38,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:17:38,173 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:38,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2073137229, now seen corresponding path program 29 times [2021-06-05 18:17:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:38,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296861964] [2021-06-05 18:17:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:38,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296861964] [2021-06-05 18:17:38,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296861964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629678829] [2021-06-05 18:17:38,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:38,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:17:38,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:38,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:38,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629678829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:38,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:38,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:17:38,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11828722] [2021-06-05 18:17:38,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:38,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:38,409 INFO L87 Difference]: Start difference. First operand 1963 states and 5403 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:38,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:38,704 INFO L93 Difference]: Finished difference Result 2741 states and 7207 transitions. [2021-06-05 18:17:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:38,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:38,707 INFO L225 Difference]: With dead ends: 2741 [2021-06-05 18:17:38,707 INFO L226 Difference]: Without dead ends: 2471 [2021-06-05 18:17:38,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-06-05 18:17:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2038. [2021-06-05 18:17:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.7727049582719685) internal successors, (5648), 2037 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5648 transitions. [2021-06-05 18:17:38,730 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5648 transitions. Word has length 70 [2021-06-05 18:17:38,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:38,730 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5648 transitions. [2021-06-05 18:17:38,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5648 transitions. [2021-06-05 18:17:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:38,732 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:38,732 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:38,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:17:38,933 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2015403099, now seen corresponding path program 30 times [2021-06-05 18:17:38,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:38,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387467596] [2021-06-05 18:17:38,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:38,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387467596] [2021-06-05 18:17:38,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387467596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:38,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515536818] [2021-06-05 18:17:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:39,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:17:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:39,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:39,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:39,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:39,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515536818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:39,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:17:39,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758153538] [2021-06-05 18:17:39,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:39,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:39,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:39,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:39,159 INFO L87 Difference]: Start difference. First operand 2038 states and 5648 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:39,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:39,391 INFO L93 Difference]: Finished difference Result 3508 states and 9381 transitions. [2021-06-05 18:17:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:39,392 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:39,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:39,396 INFO L225 Difference]: With dead ends: 3508 [2021-06-05 18:17:39,396 INFO L226 Difference]: Without dead ends: 3238 [2021-06-05 18:17:39,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-06-05 18:17:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2218. [2021-06-05 18:17:39,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.7997293640054126) internal successors, (6207), 2217 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6207 transitions. [2021-06-05 18:17:39,426 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6207 transitions. Word has length 70 [2021-06-05 18:17:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:39,428 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6207 transitions. [2021-06-05 18:17:39,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6207 transitions. [2021-06-05 18:17:39,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-06-05 18:17:39,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:39,431 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:39,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 18:17:39,645 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:39,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2037746349, now seen corresponding path program 31 times [2021-06-05 18:17:39,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:39,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348198340] [2021-06-05 18:17:39,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:39,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:39,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348198340] [2021-06-05 18:17:39,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348198340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834400033] [2021-06-05 18:17:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:39,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:39,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:39,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834400033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:39,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 18:17:39,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44349454] [2021-06-05 18:17:39,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:39,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:39,882 INFO L87 Difference]: Start difference. First operand 2218 states and 6207 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:40,246 INFO L93 Difference]: Finished difference Result 3451 states and 9241 transitions. [2021-06-05 18:17:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:17:40,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-06-05 18:17:40,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:40,250 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 18:17:40,250 INFO L226 Difference]: Without dead ends: 2876 [2021-06-05 18:17:40,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 321.3ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:17:40,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-06-05 18:17:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2253. [2021-06-05 18:17:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:40,274 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 70 [2021-06-05 18:17:40,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:40,274 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:40,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:40,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:40,276 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:40,276 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:40,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:17:40,492 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:40,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:40,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 32 times [2021-06-05 18:17:40,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:40,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301265615] [2021-06-05 18:17:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:40,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301265615] [2021-06-05 18:17:40,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301265615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153920112] [2021-06-05 18:17:40,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:40,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:40,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:40,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:40,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:40,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153920112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:40,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021151840] [2021-06-05 18:17:40,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:40,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:40,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:40,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:40,733 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:40,915 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-05 18:17:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:40,918 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 18:17:40,918 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 18:17:40,918 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 18:17:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-05 18:17:40,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:40,942 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 18:17:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:40,942 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:40,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:40,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:40,944 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:41,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:41,149 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 33 times [2021-06-05 18:17:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:41,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851456737] [2021-06-05 18:17:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:41,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:41,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851456737] [2021-06-05 18:17:41,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851456737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:41,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139606880] [2021-06-05 18:17:41,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:41,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:17:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:41,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:41,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139606880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:41,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:41,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027377035] [2021-06-05 18:17:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:41,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:41,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:41,424 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:41,670 INFO L93 Difference]: Finished difference Result 3141 states and 8187 transitions. [2021-06-05 18:17:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:41,674 INFO L225 Difference]: With dead ends: 3141 [2021-06-05 18:17:41,674 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 18:17:41,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 18:17:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2253. [2021-06-05 18:17:41,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:41,706 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 18:17:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:41,706 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:41,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:41,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:41,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:41,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:41,709 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:41,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 18:17:41,924 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:41,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 34 times [2021-06-05 18:17:41,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:41,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110669029] [2021-06-05 18:17:41,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:42,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:42,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110669029] [2021-06-05 18:17:42,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110669029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127617511] [2021-06-05 18:17:42,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:42,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:42,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:42,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:42,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:42,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127617511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:42,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:42,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804113041] [2021-06-05 18:17:42,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:42,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:42,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:42,149 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:42,358 INFO L93 Difference]: Finished difference Result 3096 states and 8097 transitions. [2021-06-05 18:17:42,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:42,361 INFO L225 Difference]: With dead ends: 3096 [2021-06-05 18:17:42,362 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 18:17:42,362 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 18:17:42,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-06-05 18:17:42,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:42,385 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 18:17:42,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:42,385 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:42,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:42,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:42,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:42,387 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:42,387 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:42,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 18:17:42,588 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:42,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:42,588 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 35 times [2021-06-05 18:17:42,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:42,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090515067] [2021-06-05 18:17:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:42,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:42,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090515067] [2021-06-05 18:17:42,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090515067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005324472] [2021-06-05 18:17:42,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:42,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:17:42,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:42,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:42,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:42,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005324472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:42,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750977639] [2021-06-05 18:17:42,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:42,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:42,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:42,817 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:43,091 INFO L93 Difference]: Finished difference Result 3046 states and 7997 transitions. [2021-06-05 18:17:43,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:43,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:43,095 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 18:17:43,095 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 18:17:43,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 18:17:43,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2253. [2021-06-05 18:17:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:43,120 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 18:17:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:43,120 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:43,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:43,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:43,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:43,122 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:43,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:43,339 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:43,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:43,339 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 36 times [2021-06-05 18:17:43,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:43,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552933809] [2021-06-05 18:17:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:43,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:43,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552933809] [2021-06-05 18:17:43,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552933809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:43,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103948630] [2021-06-05 18:17:43,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:43,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:17:43,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:43,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:43,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:43,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103948630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:43,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:43,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:43,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284819949] [2021-06-05 18:17:43,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:43,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:43,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:43,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:43,589 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:43,829 INFO L93 Difference]: Finished difference Result 2996 states and 7897 transitions. [2021-06-05 18:17:43,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:17:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:43,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:43,833 INFO L225 Difference]: With dead ends: 2996 [2021-06-05 18:17:43,833 INFO L226 Difference]: Without dead ends: 2726 [2021-06-05 18:17:43,833 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-06-05 18:17:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-06-05 18:17:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-06-05 18:17:43,862 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-06-05 18:17:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:43,862 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-06-05 18:17:43,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:43,862 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-06-05 18:17:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:43,864 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:43,864 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:44,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:17:44,065 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 37 times [2021-06-05 18:17:44,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:44,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697668937] [2021-06-05 18:17:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:44,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697668937] [2021-06-05 18:17:44,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697668937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451988151] [2021-06-05 18:17:44,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:44,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:44,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451988151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:44,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738289429] [2021-06-05 18:17:44,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:44,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:44,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:44,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:44,282 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:44,607 INFO L93 Difference]: Finished difference Result 3006 states and 7947 transitions. [2021-06-05 18:17:44,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:44,610 INFO L225 Difference]: With dead ends: 3006 [2021-06-05 18:17:44,610 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 18:17:44,610 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 18:17:44,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2253. [2021-06-05 18:17:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:44,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-06-05 18:17:44,631 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-06-05 18:17:44,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:44,631 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-06-05 18:17:44,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:44,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-06-05 18:17:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:44,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:44,633 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:44,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:44,834 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 38 times [2021-06-05 18:17:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:44,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240195093] [2021-06-05 18:17:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:44,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240195093] [2021-06-05 18:17:44,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240195093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745459654] [2021-06-05 18:17:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:44,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:44,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:44,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745459654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:45,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:45,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775760256] [2021-06-05 18:17:45,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:45,056 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:45,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:45,329 INFO L93 Difference]: Finished difference Result 3748 states and 10071 transitions. [2021-06-05 18:17:45,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:45,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:45,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:45,332 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 18:17:45,332 INFO L226 Difference]: Without dead ends: 3478 [2021-06-05 18:17:45,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-06-05 18:17:45,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-06-05 18:17:45,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-06-05 18:17:45,359 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-06-05 18:17:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:45,359 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-06-05 18:17:45,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-06-05 18:17:45,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:45,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:45,361 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:45,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:17:45,562 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:45,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:45,562 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 39 times [2021-06-05 18:17:45,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:45,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695633604] [2021-06-05 18:17:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:45,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695633604] [2021-06-05 18:17:45,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695633604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273228910] [2021-06-05 18:17:45,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:45,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:17:45,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:45,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:45,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273228910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:45,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:45,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647768390] [2021-06-05 18:17:45,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:45,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:45,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:45,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:45,784 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:46,141 INFO L93 Difference]: Finished difference Result 3210 states and 8721 transitions. [2021-06-05 18:17:46,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-06-05 18:17:46,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:46,144 INFO L225 Difference]: With dead ends: 3210 [2021-06-05 18:17:46,144 INFO L226 Difference]: Without dead ends: 2721 [2021-06-05 18:17:46,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 306.0ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-06-05 18:17:46,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-06-05 18:17:46,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-06-05 18:17:46,166 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-06-05 18:17:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:46,166 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-06-05 18:17:46,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-06-05 18:17:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:46,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:46,168 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:46,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:46,369 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:46,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:46,369 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 40 times [2021-06-05 18:17:46,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:46,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112756618] [2021-06-05 18:17:46,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:46,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112756618] [2021-06-05 18:17:46,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112756618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43455853] [2021-06-05 18:17:46,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:46,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:46,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:46,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43455853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:46,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 18:17:46,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853455479] [2021-06-05 18:17:46,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:17:46,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:46,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:17:46,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:17:46,660 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:46,908 INFO L93 Difference]: Finished difference Result 3268 states and 8783 transitions. [2021-06-05 18:17:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:46,908 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:46,911 INFO L225 Difference]: With dead ends: 3268 [2021-06-05 18:17:46,911 INFO L226 Difference]: Without dead ends: 2934 [2021-06-05 18:17:46,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 250.1ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-06-05 18:17:46,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2463. [2021-06-05 18:17:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-06-05 18:17:46,937 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-06-05 18:17:46,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:46,937 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-06-05 18:17:46,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-06-05 18:17:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:46,940 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:46,940 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:47,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 18:17:47,141 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 41 times [2021-06-05 18:17:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:47,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690690677] [2021-06-05 18:17:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:47,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690690677] [2021-06-05 18:17:47,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690690677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679594679] [2021-06-05 18:17:47,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:47,319 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:17:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:47,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:47,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:47,421 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679594679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:47,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:17:47,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667847830] [2021-06-05 18:17:47,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:17:47,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:47,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:17:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:47,422 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:47,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:47,619 INFO L93 Difference]: Finished difference Result 3561 states and 9177 transitions. [2021-06-05 18:17:47,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:47,620 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:47,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:47,623 INFO L225 Difference]: With dead ends: 3561 [2021-06-05 18:17:47,623 INFO L226 Difference]: Without dead ends: 3291 [2021-06-05 18:17:47,624 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:17:47,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-06-05 18:17:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-06-05 18:17:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:47,651 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:47,651 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:47,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:47,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:47,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:47,657 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:47,657 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:47,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:17:47,873 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:47,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 42 times [2021-06-05 18:17:47,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:47,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648040285] [2021-06-05 18:17:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:47,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648040285] [2021-06-05 18:17:47,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648040285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151608905] [2021-06-05 18:17:47,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:48,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:17:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:48,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151608905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:17:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94330552] [2021-06-05 18:17:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:48,162 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:48,395 INFO L93 Difference]: Finished difference Result 3446 states and 8947 transitions. [2021-06-05 18:17:48,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:48,399 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:17:48,399 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:17:48,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:48,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:17:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-06-05 18:17:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:48,429 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:48,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:48,429 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:48,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:48,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:48,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:48,431 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:48,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:48,632 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 43 times [2021-06-05 18:17:48,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:48,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720937229] [2021-06-05 18:17:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:48,742 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:48,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:48,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720937229] [2021-06-05 18:17:48,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720937229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188860852] [2021-06-05 18:17:48,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:48,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:48,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188860852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:48,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:17:48,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976240209] [2021-06-05 18:17:48,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:17:48,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:48,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:17:48,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:48,900 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,128 INFO L93 Difference]: Finished difference Result 3421 states and 8897 transitions. [2021-06-05 18:17:49,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:17:49,128 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:49,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:49,131 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:17:49,131 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:17:49,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 230.9ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:17:49,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-06-05 18:17:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:49,154 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:49,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:49,154 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:49,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:49,156 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:49,156 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:49,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 18:17:49,357 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 44 times [2021-06-05 18:17:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:49,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538087357] [2021-06-05 18:17:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:49,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538087357] [2021-06-05 18:17:49,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538087357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:49,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492194329] [2021-06-05 18:17:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:49,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:49,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:49,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:49,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:49,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492194329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:49,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:49,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:17:49,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088703074] [2021-06-05 18:17:49,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:49,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:49,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:49,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:49,654 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,952 INFO L93 Difference]: Finished difference Result 3371 states and 8797 transitions. [2021-06-05 18:17:49,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:49,952 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:49,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:49,955 INFO L225 Difference]: With dead ends: 3371 [2021-06-05 18:17:49,955 INFO L226 Difference]: Without dead ends: 3101 [2021-06-05 18:17:49,955 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:49,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-06-05 18:17:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-06-05 18:17:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:49,978 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:49,978 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:49,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:49,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:49,980 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:50,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,187 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:50,187 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 45 times [2021-06-05 18:17:50,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:50,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768439992] [2021-06-05 18:17:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:50,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768439992] [2021-06-05 18:17:50,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768439992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:50,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324288174] [2021-06-05 18:17:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:17:50,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:50,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324288174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:50,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:50,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:17:50,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781474227] [2021-06-05 18:17:50,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:17:50,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:50,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:17:50,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:50,431 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:50,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:50,674 INFO L93 Difference]: Finished difference Result 3321 states and 8697 transitions. [2021-06-05 18:17:50,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:50,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:50,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:50,677 INFO L225 Difference]: With dead ends: 3321 [2021-06-05 18:17:50,677 INFO L226 Difference]: Without dead ends: 3051 [2021-06-05 18:17:50,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-06-05 18:17:50,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-06-05 18:17:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:50,699 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:50,699 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:50,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:50,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:50,701 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:50,701 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:50,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,902 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:50,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:50,902 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 46 times [2021-06-05 18:17:50,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:50,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926888731] [2021-06-05 18:17:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:51,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:51,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926888731] [2021-06-05 18:17:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926888731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516893229] [2021-06-05 18:17:51,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:51,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:51,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:51,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:51,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:51,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516893229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:51,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:17:51,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987836237] [2021-06-05 18:17:51,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:51,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:51,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:51,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:51,214 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:51,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:51,544 INFO L93 Difference]: Finished difference Result 3271 states and 8597 transitions. [2021-06-05 18:17:51,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:51,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:51,548 INFO L225 Difference]: With dead ends: 3271 [2021-06-05 18:17:51,548 INFO L226 Difference]: Without dead ends: 3001 [2021-06-05 18:17:51,548 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-06-05 18:17:51,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-06-05 18:17:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:51,573 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:51,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:51,573 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:51,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:51,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:51,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:51,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:51,575 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:51,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:17:51,776 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:51,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 47 times [2021-06-05 18:17:51,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:51,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912365779] [2021-06-05 18:17:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:51,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912365779] [2021-06-05 18:17:51,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912365779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527482425] [2021-06-05 18:17:51,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:51,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:17:51,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:51,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:51,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:52,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527482425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:52,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:17:52,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719325578] [2021-06-05 18:17:52,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:17:52,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:17:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:52,026 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:52,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:52,278 INFO L93 Difference]: Finished difference Result 3221 states and 8497 transitions. [2021-06-05 18:17:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:17:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:52,281 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:17:52,281 INFO L226 Difference]: Without dead ends: 2951 [2021-06-05 18:17:52,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 240.3ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-06-05 18:17:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-06-05 18:17:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:52,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-06-05 18:17:52,306 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-06-05 18:17:52,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:52,306 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-06-05 18:17:52,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:52,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-06-05 18:17:52,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:52,308 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:52,308 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,509 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:52,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:52,509 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 48 times [2021-06-05 18:17:52,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:52,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428650093] [2021-06-05 18:17:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:52,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:52,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428650093] [2021-06-05 18:17:52,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428650093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151864824] [2021-06-05 18:17:52,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:17:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:52,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:52,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151864824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:52,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:17:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903641975] [2021-06-05 18:17:52,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:52,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:52,777 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:53,231 INFO L93 Difference]: Finished difference Result 3679 states and 9763 transitions. [2021-06-05 18:17:53,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:17:53,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:53,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:53,234 INFO L225 Difference]: With dead ends: 3679 [2021-06-05 18:17:53,234 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 18:17:53,234 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 388.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:17:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 18:17:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-06-05 18:17:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 18:17:53,259 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 18:17:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:53,259 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 18:17:53,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 18:17:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:53,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:53,261 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:53,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:17:53,461 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 49 times [2021-06-05 18:17:53,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:53,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919806100] [2021-06-05 18:17:53,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:53,533 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:53,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:53,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919806100] [2021-06-05 18:17:53,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919806100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157178048] [2021-06-05 18:17:53,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:53,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157178048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:53,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:17:53,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568142438] [2021-06-05 18:17:53,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:17:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:53,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:17:53,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:53,675 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:53,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:53,982 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 18:17:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:53,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:53,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:53,986 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 18:17:53,986 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 18:17:53,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 18:17:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 18:17:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 18:17:54,016 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 18:17:54,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:54,017 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 18:17:54,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 18:17:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:17:54,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:54,019 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:54,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:17:54,229 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 50 times [2021-06-05 18:17:54,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:54,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020789255] [2021-06-05 18:17:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:54,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:54,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020789255] [2021-06-05 18:17:54,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020789255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:54,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011590317] [2021-06-05 18:17:54,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:54,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:54,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011590317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:54,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:54,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:17:54,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804853975] [2021-06-05 18:17:54,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:54,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:54,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:54,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:54,478 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:54,947 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-05 18:17:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:17:54,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-06-05 18:17:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:54,951 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 18:17:54,951 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 18:17:54,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:17:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 18:17:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 18:17:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:54,975 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-05 18:17:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:54,975 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:54,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:54,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:54,977 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:54,977 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:55,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:17:55,189 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:55,189 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 51 times [2021-06-05 18:17:55,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:55,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255103750] [2021-06-05 18:17:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:55,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:55,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255103750] [2021-06-05 18:17:55,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255103750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:55,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874192324] [2021-06-05 18:17:55,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:55,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:17:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:55,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:55,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:55,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874192324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:55,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:55,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:17:55,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761874599] [2021-06-05 18:17:55,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:55,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:55,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:55,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:55,479 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:55,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:55,695 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 18:17:55,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:55,696 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:55,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:55,699 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:17:55,699 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:17:55,699 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:55,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:17:55,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 18:17:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:55,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:55,724 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:55,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:55,724 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:55,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:55,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:55,726 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:55,726 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:55,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:17:55,926 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 52 times [2021-06-05 18:17:55,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:55,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311635217] [2021-06-05 18:17:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:56,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311635217] [2021-06-05 18:17:56,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311635217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024712578] [2021-06-05 18:17:56,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:56,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:56,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024712578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:56,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:56,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365050557] [2021-06-05 18:17:56,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:56,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:56,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:56,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:56,225 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:56,497 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-05 18:17:56,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:56,497 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:56,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:56,501 INFO L225 Difference]: With dead ends: 3641 [2021-06-05 18:17:56,501 INFO L226 Difference]: Without dead ends: 3371 [2021-06-05 18:17:56,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:17:56,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-05 18:17:56,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-05 18:17:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:56,529 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:56,529 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:56,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:56,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:56,531 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:56,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:56,732 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 53 times [2021-06-05 18:17:56,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:56,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986697825] [2021-06-05 18:17:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:56,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:56,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986697825] [2021-06-05 18:17:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986697825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715599978] [2021-06-05 18:17:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:56,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:17:56,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:56,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:56,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715599978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:57,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:17:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79192025] [2021-06-05 18:17:57,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:57,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:57,012 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:57,292 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-05 18:17:57,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:17:57,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:57,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:57,296 INFO L225 Difference]: With dead ends: 3596 [2021-06-05 18:17:57,296 INFO L226 Difference]: Without dead ends: 3326 [2021-06-05 18:17:57,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 267.2ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:17:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-05 18:17:57,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-05 18:17:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:57,323 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:57,323 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:57,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:57,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:57,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:57,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:57,326 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:57,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:57,526 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:57,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 54 times [2021-06-05 18:17:57,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:57,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030461934] [2021-06-05 18:17:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030461934] [2021-06-05 18:17:57,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030461934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464155085] [2021-06-05 18:17:57,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:57,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:17:57,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464155085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:57,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:57,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780411029] [2021-06-05 18:17:57,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:57,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:57,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:57,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:57,803 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:58,130 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-05 18:17:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:58,130 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:58,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:58,134 INFO L225 Difference]: With dead ends: 3546 [2021-06-05 18:17:58,134 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 18:17:58,134 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:17:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 18:17:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 18:17:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:58,160 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:58,161 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:58,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:58,163 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:58,163 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:58,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:58,363 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:58,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 55 times [2021-06-05 18:17:58,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:58,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371291075] [2021-06-05 18:17:58,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:58,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:58,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371291075] [2021-06-05 18:17:58,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371291075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873108264] [2021-06-05 18:17:58,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:58,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:58,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:58,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873108264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:58,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:17:58,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159824272] [2021-06-05 18:17:58,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:17:58,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:58,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:17:58,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:58,655 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:58,927 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-05 18:17:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:58,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:58,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:58,930 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:17:58,930 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:17:58,931 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 266.0ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:17:58,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:17:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:17:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:58,955 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:58,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:58,955 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:58,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:58,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:58,957 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:17:59,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 18:17:59,158 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 56 times [2021-06-05 18:17:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:59,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114561004] [2021-06-05 18:17:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:59,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:59,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114561004] [2021-06-05 18:17:59,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114561004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:59,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337149619] [2021-06-05 18:17:59,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:59,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:59,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:59,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:17:59,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:59,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337149619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:59,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:59,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:17:59,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902783800] [2021-06-05 18:17:59,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:17:59,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:59,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:17:59,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:59,425 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:59,778 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 18:17:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:17:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:17:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:59,782 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:17:59,782 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:17:59,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:17:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:17:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 18:17:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:59,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:17:59,805 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:17:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:59,806 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:17:59,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:17:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:17:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:17:59,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:59,808 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:00,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,008 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:00,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:00,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 57 times [2021-06-05 18:18:00,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:00,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701164553] [2021-06-05 18:18:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:00,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:00,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701164553] [2021-06-05 18:18:00,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701164553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860325343] [2021-06-05 18:18:00,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:18:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:00,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860325343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:00,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:00,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527708433] [2021-06-05 18:18:00,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:00,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:00,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:00,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:00,262 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:00,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:00,570 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-05 18:18:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:00,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:18:00,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:00,574 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:18:00,574 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:18:00,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:00,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:18:00,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-05 18:18:00,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:00,597 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:00,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:00,597 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:00,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:00,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:00,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:00,599 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:00,599 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:00,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 18:18:00,800 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:00,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 58 times [2021-06-05 18:18:00,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:00,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526500261] [2021-06-05 18:18:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:00,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526500261] [2021-06-05 18:18:00,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526500261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594133704] [2021-06-05 18:18:00,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:00,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:00,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:00,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:01,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594133704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:01,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:01,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587354654] [2021-06-05 18:18:01,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:01,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:01,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:01,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:01,064 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:01,461 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-05 18:18:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:18:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:01,464 INFO L225 Difference]: With dead ends: 3406 [2021-06-05 18:18:01,464 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 18:18:01,464 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 374.2ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 18:18:01,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-05 18:18:01,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:01,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 18:18:01,488 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 18:18:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:01,488 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 18:18:01,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 18:18:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:01,490 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:01,490 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:01,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:01,691 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 59 times [2021-06-05 18:18:01,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:01,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108169537] [2021-06-05 18:18:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:01,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108169537] [2021-06-05 18:18:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108169537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581179357] [2021-06-05 18:18:01,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:01,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:18:01,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:01,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:01,936 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:01,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581179357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:01,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:01,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655548228] [2021-06-05 18:18:01,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:01,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:01,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:01,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:01,937 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:02,289 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 18:18:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:18:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:02,293 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 18:18:02,293 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 18:18:02,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 318.2ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 18:18:02,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 18:18:02,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 18:18:02,322 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 18:18:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:02,322 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 18:18:02,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 18:18:02,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:02,324 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:02,324 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:02,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 18:18:02,529 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:02,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 60 times [2021-06-05 18:18:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:02,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028285561] [2021-06-05 18:18:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:02,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028285561] [2021-06-05 18:18:02,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028285561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179495105] [2021-06-05 18:18:02,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:02,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:18:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:02,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179495105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:02,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900970020] [2021-06-05 18:18:02,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:02,772 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:03,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:03,240 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 18:18:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-06-05 18:18:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:03,244 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 18:18:03,244 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 18:18:03,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 428.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 18:18:03,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 18:18:03,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 18:18:03,264 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 18:18:03,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:03,265 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 18:18:03,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 18:18:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:03,266 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:03,266 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:03,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:03,467 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 61 times [2021-06-05 18:18:03,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:03,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216154755] [2021-06-05 18:18:03,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:03,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:03,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216154755] [2021-06-05 18:18:03,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216154755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144246180] [2021-06-05 18:18:03,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:03,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:03,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:03,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144246180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:03,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-06-05 18:18:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591961516] [2021-06-05 18:18:03,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:03,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:03,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:03,790 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:04,094 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 18:18:04,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:04,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:04,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:04,096 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 18:18:04,096 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 18:18:04,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 300.6ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:04,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 18:18:04,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 18:18:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 18:18:04,114 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 18:18:04,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:04,115 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 18:18:04,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 18:18:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:04,116 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:04,116 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:04,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 18:18:04,333 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:04,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:04,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 62 times [2021-06-05 18:18:04,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:04,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781546461] [2021-06-05 18:18:04,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:04,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781546461] [2021-06-05 18:18:04,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781546461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:04,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969877057] [2021-06-05 18:18:04,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:04,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:04,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:04,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:04,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:04,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969877057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:04,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:04,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:04,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240087979] [2021-06-05 18:18:04,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:04,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:04,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:04,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:04,610 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:04,814 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 18:18:04,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:18:04,815 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:04,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:04,818 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 18:18:04,818 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 18:18:04,818 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:18:04,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 18:18:04,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 18:18:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 18:18:04,838 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 18:18:04,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:04,838 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 18:18:04,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:04,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 18:18:04,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:04,840 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:04,840 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:05,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-06-05 18:18:05,040 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:05,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:05,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 63 times [2021-06-05 18:18:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:05,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663365080] [2021-06-05 18:18:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:05,163 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:05,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:05,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663365080] [2021-06-05 18:18:05,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663365080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844364058] [2021-06-05 18:18:05,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:05,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:05,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:05,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:05,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844364058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:05,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:05,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952228092] [2021-06-05 18:18:05,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:05,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:05,356 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:05,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:05,637 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 18:18:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:05,637 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:05,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:05,640 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 18:18:05,640 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 18:18:05,640 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:05,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 18:18:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 18:18:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:05,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 18:18:05,663 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 18:18:05,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:05,663 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 18:18:05,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:05,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 18:18:05,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:05,665 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:05,665 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:05,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:05,866 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 64 times [2021-06-05 18:18:05,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:05,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863162537] [2021-06-05 18:18:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:05,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863162537] [2021-06-05 18:18:05,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863162537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743963801] [2021-06-05 18:18:05,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:06,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743963801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:06,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:06,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071989418] [2021-06-05 18:18:06,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:06,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:06,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:06,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:06,146 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:06,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:06,406 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 18:18:06,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:18:06,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:06,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:06,410 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:18:06,410 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:18:06,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:18:06,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:18:06,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 18:18:06,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 18:18:06,433 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 18:18:06,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:06,433 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 18:18:06,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:06,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 18:18:06,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:06,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:06,435 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:06,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,636 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:06,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:06,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 65 times [2021-06-05 18:18:06,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:06,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431745049] [2021-06-05 18:18:06,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:06,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431745049] [2021-06-05 18:18:06,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431745049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757286744] [2021-06-05 18:18:06,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:06,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757286744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:06,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:06,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245657329] [2021-06-05 18:18:06,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:06,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:06,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:06,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:06,944 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:07,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:07,271 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 18:18:07,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:07,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:07,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:07,274 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:18:07,275 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:18:07,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:18:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 18:18:07,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 18:18:07,300 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 18:18:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 18:18:07,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 18:18:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:07,303 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:07,303 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:07,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:18:07,519 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 66 times [2021-06-05 18:18:07,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:07,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593822961] [2021-06-05 18:18:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:07,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593822961] [2021-06-05 18:18:07,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593822961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471028891] [2021-06-05 18:18:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:07,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:07,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:07,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471028891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:07,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:07,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176054866] [2021-06-05 18:18:07,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:07,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:07,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:07,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:07,803 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:08,067 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 18:18:08,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:08,067 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:08,070 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:18:08,070 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:18:08,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:18:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 18:18:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 18:18:08,095 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 18:18:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:08,095 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 18:18:08,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 18:18:08,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:08,097 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:08,097 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:08,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,298 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 67 times [2021-06-05 18:18:08,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:08,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119199776] [2021-06-05 18:18:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:08,420 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:08,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:08,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119199776] [2021-06-05 18:18:08,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119199776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:08,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538650182] [2021-06-05 18:18:08,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:08,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:08,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538650182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:08,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:08,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:08,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840746118] [2021-06-05 18:18:08,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:08,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:08,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:08,612 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:08,969 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 18:18:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:08,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:08,974 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 18:18:08,974 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 18:18:08,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:08,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 18:18:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 18:18:08,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:08,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 18:18:09,000 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 18:18:09,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:09,000 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 18:18:09,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:09,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 18:18:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:09,002 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:09,002 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:09,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-06-05 18:18:09,202 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:09,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:09,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 68 times [2021-06-05 18:18:09,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:09,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351153573] [2021-06-05 18:18:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:09,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:09,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351153573] [2021-06-05 18:18:09,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351153573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874796631] [2021-06-05 18:18:09,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:09,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:09,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:09,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:09,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874796631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:09,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:09,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454323044] [2021-06-05 18:18:09,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:09,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:09,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:09,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:09,482 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:09,780 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 18:18:09,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:09,784 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:18:09,784 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:18:09,784 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:09,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:18:09,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:18:09,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 18:18:09,812 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 18:18:09,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:09,812 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 18:18:09,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 18:18:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:09,814 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:09,814 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:10,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:10,025 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:10,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 69 times [2021-06-05 18:18:10,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:10,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500070497] [2021-06-05 18:18:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:10,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500070497] [2021-06-05 18:18:10,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500070497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:10,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573155672] [2021-06-05 18:18:10,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:10,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:10,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:10,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573155672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:10,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:10,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:10,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352144715] [2021-06-05 18:18:10,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:10,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:10,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:10,312 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:10,719 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 18:18:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:10,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:10,723 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 18:18:10,723 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 18:18:10,723 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 18:18:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 18:18:10,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:10,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 18:18:10,750 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 18:18:10,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:10,750 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 18:18:10,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 18:18:10,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:10,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:10,752 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:10,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 18:18:10,952 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:10,953 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 70 times [2021-06-05 18:18:10,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:10,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49839967] [2021-06-05 18:18:10,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:11,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49839967] [2021-06-05 18:18:11,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49839967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109470993] [2021-06-05 18:18:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:11,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:11,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:11,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109470993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:11,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089729385] [2021-06-05 18:18:11,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:11,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:11,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:11,202 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:11,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:11,538 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 18:18:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:11,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:11,541 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 18:18:11,542 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:18:11,542 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:11,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:18:11,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 18:18:11,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 18:18:11,571 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 18:18:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:11,571 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 18:18:11,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 18:18:11,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:11,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:11,573 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:11,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:11,774 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:11,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 71 times [2021-06-05 18:18:11,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:11,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776075894] [2021-06-05 18:18:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:11,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:11,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776075894] [2021-06-05 18:18:11,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776075894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017448722] [2021-06-05 18:18:11,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:11,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:11,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:12,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017448722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:12,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:12,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:12,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414358852] [2021-06-05 18:18:12,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:12,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:12,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:12,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:12,083 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:12,571 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 18:18:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:12,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:12,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:12,575 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 18:18:12,575 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 18:18:12,576 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 18:18:12,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 18:18:12,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:12,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 18:18:12,603 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 18:18:12,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:12,603 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 18:18:12,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:12,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 18:18:12,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:12,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:12,605 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:12,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:18:12,806 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:12,806 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 72 times [2021-06-05 18:18:12,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:12,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403236933] [2021-06-05 18:18:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:12,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:12,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403236933] [2021-06-05 18:18:12,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403236933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:12,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988740075] [2021-06-05 18:18:12,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:12,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988740075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:13,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-05 18:18:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460794707] [2021-06-05 18:18:13,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:13,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:13,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:13,061 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:13,426 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 18:18:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:13,431 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 18:18:13,431 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 18:18:13,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:13,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 18:18:13,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 18:18:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 18:18:13,463 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 18:18:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:13,463 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 18:18:13,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 18:18:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:13,465 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:13,465 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:13,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,666 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:13,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:13,666 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 73 times [2021-06-05 18:18:13,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:13,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070127510] [2021-06-05 18:18:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070127510] [2021-06-05 18:18:13,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070127510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060649947] [2021-06-05 18:18:13,752 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:13,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:14,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060649947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:14,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:14,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567821728] [2021-06-05 18:18:14,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:14,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:14,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:14,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:14,008 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:14,475 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 18:18:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-06-05 18:18:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:14,479 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 18:18:14,479 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 18:18:14,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 18:18:14,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 18:18:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 18:18:14,502 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 18:18:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:14,502 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 18:18:14,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 18:18:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:14,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:14,504 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:14,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:14,705 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 74 times [2021-06-05 18:18:14,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:14,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266817001] [2021-06-05 18:18:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:14,851 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:14,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266817001] [2021-06-05 18:18:14,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266817001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766787435] [2021-06-05 18:18:14,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:14,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:14,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:14,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:14,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:15,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766787435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:15,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:15,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753627560] [2021-06-05 18:18:15,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:15,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:15,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:15,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:15,032 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:15,290 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 18:18:15,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:15,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:15,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:15,293 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 18:18:15,293 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 18:18:15,293 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 275.3ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:15,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 18:18:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 18:18:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 18:18:15,313 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 18:18:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:15,313 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 18:18:15,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 18:18:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:15,315 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:15,315 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:15,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:15,515 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:15,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:15,515 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 75 times [2021-06-05 18:18:15,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:15,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008650789] [2021-06-05 18:18:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:15,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:15,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008650789] [2021-06-05 18:18:15,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008650789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051840569] [2021-06-05 18:18:15,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:15,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:15,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:15,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:15,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:15,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051840569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:15,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:15,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998665009] [2021-06-05 18:18:15,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:15,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:15,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:15,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:15,839 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:16,152 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 18:18:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:16,152 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:16,155 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 18:18:16,155 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 18:18:16,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 309.0ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 18:18:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 18:18:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 18:18:16,177 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 18:18:16,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:16,177 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 18:18:16,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 18:18:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:16,179 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:16,179 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:16,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:16,380 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:16,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:16,380 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 76 times [2021-06-05 18:18:16,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:16,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670707409] [2021-06-05 18:18:16,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:16,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:16,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670707409] [2021-06-05 18:18:16,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670707409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:16,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332010598] [2021-06-05 18:18:16,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:16,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:16,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:16,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:16,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:16,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332010598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:16,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:16,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:16,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153976814] [2021-06-05 18:18:16,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:16,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:16,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:16,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:16,653 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:16,940 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 18:18:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:16,944 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 18:18:16,944 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 18:18:16,944 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:16,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 18:18:16,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 18:18:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 18:18:16,971 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 18:18:16,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:16,971 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 18:18:16,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:16,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 18:18:16,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:16,973 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:16,973 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:17,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:17,174 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:17,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 77 times [2021-06-05 18:18:17,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:17,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463909316] [2021-06-05 18:18:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:17,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:17,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463909316] [2021-06-05 18:18:17,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463909316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:17,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935878921] [2021-06-05 18:18:17,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:17,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:17,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935878921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:17,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:17,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:17,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472626880] [2021-06-05 18:18:17,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:17,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:17,467 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:17,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:17,822 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 18:18:17,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:17,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:17,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:17,826 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 18:18:17,826 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 18:18:17,826 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 343.9ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 18:18:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 18:18:17,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 18:18:17,851 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 18:18:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:17,851 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 18:18:17,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:17,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 18:18:17,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:17,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:17,853 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:18,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,053 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:18,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 78 times [2021-06-05 18:18:18,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:18,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439456755] [2021-06-05 18:18:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:18,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439456755] [2021-06-05 18:18:18,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439456755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531260873] [2021-06-05 18:18:18,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:18,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:18,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:18,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531260873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:18,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:18,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125857661] [2021-06-05 18:18:18,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:18,326 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:18,654 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 18:18:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:18,658 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 18:18:18,658 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 18:18:18,658 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 309.3ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 18:18:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 18:18:18,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 18:18:18,691 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 18:18:18,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:18,691 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 18:18:18,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 18:18:18,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:18,693 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:18,693 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:18,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,894 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:18,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 79 times [2021-06-05 18:18:18,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:18,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49406367] [2021-06-05 18:18:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,007 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:19,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49406367] [2021-06-05 18:18:19,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49406367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532577143] [2021-06-05 18:18:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:19,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:19,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532577143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:19,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838348442] [2021-06-05 18:18:19,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:19,183 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:19,584 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 18:18:19,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:19,588 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 18:18:19,588 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 18:18:19,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:19,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 18:18:19,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 18:18:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 18:18:19,616 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 18:18:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:19,616 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 18:18:19,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:19,616 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 18:18:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:19,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:19,618 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:19,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 18:18:19,818 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:19,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 80 times [2021-06-05 18:18:19,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:19,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663888880] [2021-06-05 18:18:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:19,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663888880] [2021-06-05 18:18:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663888880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044953515] [2021-06-05 18:18:19,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:19,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:19,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:19,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:19,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044953515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:20,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:20,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207113979] [2021-06-05 18:18:20,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:20,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:20,087 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:20,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:20,426 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 18:18:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:20,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:20,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:20,430 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 18:18:20,430 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 18:18:20,430 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 18:18:20,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 18:18:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:20,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 18:18:20,466 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 18:18:20,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:20,466 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 18:18:20,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:20,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 18:18:20,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:20,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:20,468 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:20,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:20,668 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 81 times [2021-06-05 18:18:20,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:20,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893714378] [2021-06-05 18:18:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893714378] [2021-06-05 18:18:20,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893714378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720849253] [2021-06-05 18:18:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:20,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:20,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:20,933 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720849253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:20,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722146642] [2021-06-05 18:18:20,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:20,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:20,934 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:21,362 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 18:18:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:21,366 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:18:21,366 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:18:21,366 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:21,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:18:21,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 18:18:21,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 18:18:21,394 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 18:18:21,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:21,394 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 18:18:21,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:21,394 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 18:18:21,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:21,396 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:21,396 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:21,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 18:18:21,596 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 82 times [2021-06-05 18:18:21,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:21,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390875598] [2021-06-05 18:18:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:21,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390875598] [2021-06-05 18:18:21,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390875598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:21,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434385121] [2021-06-05 18:18:21,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:21,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:21,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434385121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:21,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:21,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:21,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186432571] [2021-06-05 18:18:21,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:21,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:21,857 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:22,228 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 18:18:22,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:22,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:22,231 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 18:18:22,231 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 18:18:22,231 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:22,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 18:18:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 18:18:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 18:18:22,259 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 18:18:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:22,259 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 18:18:22,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 18:18:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:22,261 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:22,261 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:22,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:22,461 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:22,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:22,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 83 times [2021-06-05 18:18:22,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:22,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81273930] [2021-06-05 18:18:22,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:22,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81273930] [2021-06-05 18:18:22,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81273930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:22,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331518931] [2021-06-05 18:18:22,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:22,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:22,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:22,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:22,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331518931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:22,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:22,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:22,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46834436] [2021-06-05 18:18:22,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:22,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:22,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:22,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:22,780 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:23,255 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 18:18:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:23,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:23,259 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 18:18:23,259 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 18:18:23,259 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:23,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 18:18:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 18:18:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:23,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 18:18:23,289 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 18:18:23,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:23,289 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 18:18:23,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:23,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 18:18:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:23,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:23,291 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:23,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:23,491 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:23,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:23,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 84 times [2021-06-05 18:18:23,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:23,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262862355] [2021-06-05 18:18:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:23,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:23,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262862355] [2021-06-05 18:18:23,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262862355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872360893] [2021-06-05 18:18:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:23,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:23,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:23,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:23,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:23,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872360893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992207615] [2021-06-05 18:18:23,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:23,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:23,750 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:24,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:24,152 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 18:18:24,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:24,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:24,155 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 18:18:24,155 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 18:18:24,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 18:18:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 18:18:24,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:24,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 18:18:24,184 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 18:18:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:24,184 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 18:18:24,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 18:18:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:24,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:24,186 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:24,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:24,387 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:24,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:24,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 85 times [2021-06-05 18:18:24,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:24,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687264983] [2021-06-05 18:18:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:24,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687264983] [2021-06-05 18:18:24,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687264983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:24,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851029337] [2021-06-05 18:18:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:24,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:24,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:24,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851029337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:24,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:24,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:24,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500212826] [2021-06-05 18:18:24,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:24,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:24,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:24,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:24,649 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:25,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:25,144 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 18:18:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-06-05 18:18:25,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:25,147 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 18:18:25,147 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 18:18:25,148 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 458.1ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:18:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 18:18:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 18:18:25,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 18:18:25,168 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 18:18:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:25,168 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 18:18:25,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 18:18:25,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:25,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:25,170 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:25,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:25,370 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:25,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:25,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 86 times [2021-06-05 18:18:25,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:25,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631075787] [2021-06-05 18:18:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:25,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:25,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631075787] [2021-06-05 18:18:25,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631075787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:25,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299858227] [2021-06-05 18:18:25,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:25,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:25,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:25,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:25,733 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:25,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299858227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:25,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:25,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-06-05 18:18:25,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146058224] [2021-06-05 18:18:25,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:18:25,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:18:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:18:25,734 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:26,041 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 18:18:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:26,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:26,044 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 18:18:26,044 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 18:18:26,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 349.9ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 18:18:26,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 18:18:26,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 18:18:26,064 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 18:18:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:26,064 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 18:18:26,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 18:18:26,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:26,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:26,066 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:26,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:26,266 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:26,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:26,266 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 87 times [2021-06-05 18:18:26,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:26,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105484396] [2021-06-05 18:18:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:26,403 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:26,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:26,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105484396] [2021-06-05 18:18:26,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105484396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:26,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249865346] [2021-06-05 18:18:26,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:26,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:26,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:26,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:26,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249865346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:26,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:26,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:26,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108268940] [2021-06-05 18:18:26,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:26,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:26,593 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:26,830 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 18:18:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:26,833 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 18:18:26,833 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 18:18:26,834 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:18:26,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 18:18:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 18:18:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 18:18:26,856 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 18:18:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:26,856 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 18:18:26,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:26,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 18:18:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:26,857 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:26,858 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:27,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:27,066 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 88 times [2021-06-05 18:18:27,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:27,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120447789] [2021-06-05 18:18:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:27,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:27,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120447789] [2021-06-05 18:18:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120447789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730163786] [2021-06-05 18:18:27,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:27,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:27,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:27,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:27,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:27,439 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:27,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730163786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706370611] [2021-06-05 18:18:27,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:27,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:27,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:27,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:27,440 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:27,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:27,746 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 18:18:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:27,747 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:27,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:27,750 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:18:27,750 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:18:27,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:27,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:18:27,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 18:18:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 18:18:27,775 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 18:18:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:27,775 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 18:18:27,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 18:18:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:27,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:27,777 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:27,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 18:18:27,985 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 89 times [2021-06-05 18:18:27,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:27,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195104337] [2021-06-05 18:18:27,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:28,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195104337] [2021-06-05 18:18:28,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195104337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:28,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685904607] [2021-06-05 18:18:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:28,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:28,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:28,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:28,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685904607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:28,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:28,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130684563] [2021-06-05 18:18:28,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:28,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:28,293 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:28,574 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 18:18:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:28,574 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:28,578 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 18:18:28,578 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 18:18:28,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:28,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 18:18:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 18:18:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:28,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 18:18:28,602 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 18:18:28,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:28,602 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 18:18:28,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:28,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 18:18:28,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:28,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:28,604 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:28,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:28,805 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 90 times [2021-06-05 18:18:28,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:28,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067443467] [2021-06-05 18:18:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:28,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067443467] [2021-06-05 18:18:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067443467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367870476] [2021-06-05 18:18:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:29,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:29,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367870476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:29,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:29,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360848295] [2021-06-05 18:18:29,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:29,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:29,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:29,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:29,126 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:29,480 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 18:18:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:29,483 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 18:18:29,483 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 18:18:29,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=434, Invalid=1372, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 18:18:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 18:18:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 18:18:29,508 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 18:18:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:29,509 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 18:18:29,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 18:18:29,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:29,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:29,511 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:29,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 18:18:29,711 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 91 times [2021-06-05 18:18:29,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:29,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287502999] [2021-06-05 18:18:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:29,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287502999] [2021-06-05 18:18:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287502999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617913184] [2021-06-05 18:18:29,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:29,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:30,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617913184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:30,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:30,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734899863] [2021-06-05 18:18:30,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:30,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:30,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:30,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:30,010 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:30,316 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 18:18:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:30,319 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 18:18:30,319 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 18:18:30,320 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:30,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 18:18:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 18:18:30,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 18:18:30,345 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 18:18:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:30,345 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 18:18:30,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:30,345 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 18:18:30,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:30,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:30,347 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:30,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:30,547 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:30,548 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 92 times [2021-06-05 18:18:30,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:30,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470787177] [2021-06-05 18:18:30,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:30,672 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:30,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470787177] [2021-06-05 18:18:30,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470787177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925679883] [2021-06-05 18:18:30,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:30,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:30,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:30,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:30,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925679883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:30,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465450923] [2021-06-05 18:18:30,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:30,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:30,860 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:31,273 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 18:18:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:31,276 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 18:18:31,277 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 18:18:31,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 408.2ms TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:31,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 18:18:31,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 18:18:31,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 18:18:31,303 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 18:18:31,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:31,303 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 18:18:31,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:31,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 18:18:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:31,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:31,305 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:31,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 18:18:31,506 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:31,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:31,507 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 93 times [2021-06-05 18:18:31,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:31,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219831795] [2021-06-05 18:18:31,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:31,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219831795] [2021-06-05 18:18:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219831795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479394955] [2021-06-05 18:18:31,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:31,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:31,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:31,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:31,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479394955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:31,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:31,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738000175] [2021-06-05 18:18:31,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:31,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:31,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:31,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:31,810 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:32,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:32,168 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 18:18:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:32,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:32,171 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 18:18:32,171 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 18:18:32,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 18:18:32,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 18:18:32,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 18:18:32,199 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 18:18:32,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:32,199 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 18:18:32,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 18:18:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:32,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:32,202 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:32,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:18:32,402 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:32,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:32,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 94 times [2021-06-05 18:18:32,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:32,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397735985] [2021-06-05 18:18:32,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:32,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397735985] [2021-06-05 18:18:32,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397735985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:32,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107543221] [2021-06-05 18:18:32,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:32,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:32,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:32,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:32,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:32,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107543221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:32,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:32,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:32,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728523449] [2021-06-05 18:18:32,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:32,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:32,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:32,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:32,736 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:33,199 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 18:18:33,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:33,199 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:33,203 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 18:18:33,203 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 18:18:33,203 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 441.6ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 18:18:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 18:18:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 18:18:33,232 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 18:18:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:33,232 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 18:18:33,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 18:18:33,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:33,234 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:33,234 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:33,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:18:33,435 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:33,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:33,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 95 times [2021-06-05 18:18:33,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:33,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290867490] [2021-06-05 18:18:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:33,550 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:33,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:33,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290867490] [2021-06-05 18:18:33,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290867490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:33,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130470276] [2021-06-05 18:18:33,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:33,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:33,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130470276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:33,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:33,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:33,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267425895] [2021-06-05 18:18:33,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:33,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:33,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:33,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:33,730 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:34,114 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 18:18:34,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:34,115 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:34,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:34,118 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 18:18:34,118 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 18:18:34,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 355.8ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 18:18:34,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 18:18:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 18:18:34,150 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 18:18:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:34,150 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 18:18:34,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 18:18:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:34,152 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:34,153 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:34,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:34,353 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:34,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:34,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 96 times [2021-06-05 18:18:34,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:34,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158989847] [2021-06-05 18:18:34,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:34,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:34,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158989847] [2021-06-05 18:18:34,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158989847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:34,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257866612] [2021-06-05 18:18:34,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:34,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:34,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:34,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257866612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:34,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:34,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:34,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358231870] [2021-06-05 18:18:34,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:34,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:34,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:34,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:34,694 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:35,200 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 18:18:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:35,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:35,204 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 18:18:35,205 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 18:18:35,205 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 508.9ms TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:18:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 18:18:35,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 18:18:35,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:35,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 18:18:35,235 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 18:18:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:35,235 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 18:18:35,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 18:18:35,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:35,237 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:35,237 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:35,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 18:18:35,438 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:35,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:35,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 97 times [2021-06-05 18:18:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:35,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101374552] [2021-06-05 18:18:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:35,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:35,545 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:35,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101374552] [2021-06-05 18:18:35,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101374552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:35,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556345177] [2021-06-05 18:18:35,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:35,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:35,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556345177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:35,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:35,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:35,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752564013] [2021-06-05 18:18:35,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:35,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:35,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:35,729 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:36,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:36,143 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 18:18:36,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:36,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:36,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:36,146 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 18:18:36,146 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 18:18:36,146 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 18:18:36,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 18:18:36,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 18:18:36,174 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 18:18:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:36,175 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 18:18:36,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 18:18:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:36,177 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:36,177 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:36,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,385 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 98 times [2021-06-05 18:18:36,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:36,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972925585] [2021-06-05 18:18:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:36,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972925585] [2021-06-05 18:18:36,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972925585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414971273] [2021-06-05 18:18:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:36,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:36,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:36,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414971273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:36,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:18:36,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529960301] [2021-06-05 18:18:36,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:36,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:36,687 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:37,292 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 18:18:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:18:37,293 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:37,296 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 18:18:37,297 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 18:18:37,297 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 576.9ms TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:18:37,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 18:18:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 18:18:37,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 18:18:37,328 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 18:18:37,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:37,328 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 18:18:37,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 18:18:37,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:37,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:37,330 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:37,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 18:18:37,531 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:37,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:37,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 99 times [2021-06-05 18:18:37,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:37,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669888289] [2021-06-05 18:18:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:37,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669888289] [2021-06-05 18:18:37,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669888289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612297535] [2021-06-05 18:18:37,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:37,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:37,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:37,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:37,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612297535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:37,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:37,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566520728] [2021-06-05 18:18:37,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:37,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:37,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:37,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:37,843 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:38,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:38,292 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 18:18:38,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:38,292 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:38,296 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 18:18:38,296 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 18:18:38,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:18:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 18:18:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 18:18:38,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:38,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 18:18:38,328 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 18:18:38,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:38,328 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 18:18:38,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:38,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 18:18:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:38,330 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:38,330 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:38,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:38,530 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:38,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 100 times [2021-06-05 18:18:38,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:38,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58054312] [2021-06-05 18:18:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:38,640 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:38,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:38,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58054312] [2021-06-05 18:18:38,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58054312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:38,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571375875] [2021-06-05 18:18:38,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:38,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:38,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:38,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571375875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:38,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:38,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:38,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407576874] [2021-06-05 18:18:38,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:38,832 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:39,395 INFO L93 Difference]: Finished difference Result 4195 states and 11381 transitions. [2021-06-05 18:18:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:18:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-06-05 18:18:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:39,400 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 18:18:39,400 INFO L226 Difference]: Without dead ends: 3706 [2021-06-05 18:18:39,400 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 527.1ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:18:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-06-05 18:18:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 2313. [2021-06-05 18:18:39,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.737024221453287) internal successors, (6328), 2312 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:39,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6328 transitions. [2021-06-05 18:18:39,424 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6328 transitions. Word has length 100 [2021-06-05 18:18:39,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:39,424 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6328 transitions. [2021-06-05 18:18:39,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:39,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6328 transitions. [2021-06-05 18:18:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:39,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:39,426 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:39,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:39,627 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:39,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:39,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 101 times [2021-06-05 18:18:39,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:39,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758048499] [2021-06-05 18:18:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:39,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:39,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758048499] [2021-06-05 18:18:39,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758048499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:39,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850117926] [2021-06-05 18:18:39,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:39,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:39,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:39,997 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850117926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:39,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:39,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:39,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521633159] [2021-06-05 18:18:39,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:39,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:39,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:39,998 INFO L87 Difference]: Start difference. First operand 2313 states and 6328 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:40,287 INFO L93 Difference]: Finished difference Result 3431 states and 8767 transitions. [2021-06-05 18:18:40,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:40,288 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:40,291 INFO L225 Difference]: With dead ends: 3431 [2021-06-05 18:18:40,291 INFO L226 Difference]: Without dead ends: 3161 [2021-06-05 18:18:40,291 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-05 18:18:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2388. [2021-06-05 18:18:40,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.7452869710934227) internal successors, (6553), 2387 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6553 transitions. [2021-06-05 18:18:40,316 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6553 transitions. Word has length 105 [2021-06-05 18:18:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:40,316 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6553 transitions. [2021-06-05 18:18:40,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:40,316 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6553 transitions. [2021-06-05 18:18:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:40,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:40,318 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:40,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 18:18:40,518 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:40,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:40,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 102 times [2021-06-05 18:18:40,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:40,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343353225] [2021-06-05 18:18:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:40,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:40,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343353225] [2021-06-05 18:18:40,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343353225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:40,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115308287] [2021-06-05 18:18:40,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:40,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:40,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:40,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:40,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:40,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115308287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:40,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:40,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:40,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514486179] [2021-06-05 18:18:40,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:40,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:40,886 INFO L87 Difference]: Start difference. First operand 2388 states and 6553 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:41,221 INFO L93 Difference]: Finished difference Result 3801 states and 9582 transitions. [2021-06-05 18:18:41,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:41,221 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:41,225 INFO L225 Difference]: With dead ends: 3801 [2021-06-05 18:18:41,225 INFO L226 Difference]: Without dead ends: 3531 [2021-06-05 18:18:41,225 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 373.1ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:41,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-06-05 18:18:41,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2463. [2021-06-05 18:18:41,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.753046303818034) internal successors, (6778), 2462 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6778 transitions. [2021-06-05 18:18:41,250 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6778 transitions. Word has length 105 [2021-06-05 18:18:41,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:41,250 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6778 transitions. [2021-06-05 18:18:41,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6778 transitions. [2021-06-05 18:18:41,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:41,252 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:41,252 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:41,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:41,453 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:41,453 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 103 times [2021-06-05 18:18:41,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:41,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094792466] [2021-06-05 18:18:41,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:41,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:41,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094792466] [2021-06-05 18:18:41,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094792466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123467282] [2021-06-05 18:18:41,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:41,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:41,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:41,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123467282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:41,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:41,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14929241] [2021-06-05 18:18:41,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:41,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:41,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:41,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:41,808 INFO L87 Difference]: Start difference. First operand 2463 states and 6778 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:42,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:42,127 INFO L93 Difference]: Finished difference Result 3831 states and 9717 transitions. [2021-06-05 18:18:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:42,130 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 18:18:42,130 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 18:18:42,131 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:42,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 18:18:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2538. [2021-06-05 18:18:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 2.760346866377611) internal successors, (7003), 2537 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 7003 transitions. [2021-06-05 18:18:42,155 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 7003 transitions. Word has length 105 [2021-06-05 18:18:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:42,155 INFO L482 AbstractCegarLoop]: Abstraction has 2538 states and 7003 transitions. [2021-06-05 18:18:42,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 7003 transitions. [2021-06-05 18:18:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:42,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:42,157 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:42,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:42,358 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:42,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:42,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 104 times [2021-06-05 18:18:42,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:42,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899187016] [2021-06-05 18:18:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:42,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899187016] [2021-06-05 18:18:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899187016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342137744] [2021-06-05 18:18:42,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:42,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:42,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:42,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342137744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:42,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:42,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754343084] [2021-06-05 18:18:42,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:42,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:42,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:42,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:42,697 INFO L87 Difference]: Start difference. First operand 2538 states and 7003 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:43,094 INFO L93 Difference]: Finished difference Result 3856 states and 9842 transitions. [2021-06-05 18:18:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:43,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:43,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:43,097 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 18:18:43,097 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 18:18:43,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:43,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 18:18:43,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2613. [2021-06-05 18:18:43,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.767228177641654) internal successors, (7228), 2612 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7228 transitions. [2021-06-05 18:18:43,122 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7228 transitions. Word has length 105 [2021-06-05 18:18:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:43,122 INFO L482 AbstractCegarLoop]: Abstraction has 2613 states and 7228 transitions. [2021-06-05 18:18:43,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:43,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7228 transitions. [2021-06-05 18:18:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:43,124 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:43,124 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:43,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:18:43,324 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 105 times [2021-06-05 18:18:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:43,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131766545] [2021-06-05 18:18:43,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:43,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131766545] [2021-06-05 18:18:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131766545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:43,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128295041] [2021-06-05 18:18:43,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:43,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:43,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:43,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:43,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128295041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:43,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:43,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:43,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306311912] [2021-06-05 18:18:43,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:43,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:43,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:43,650 INFO L87 Difference]: Start difference. First operand 2613 states and 7228 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:43,998 INFO L93 Difference]: Finished difference Result 3881 states and 9967 transitions. [2021-06-05 18:18:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:44,002 INFO L225 Difference]: With dead ends: 3881 [2021-06-05 18:18:44,002 INFO L226 Difference]: Without dead ends: 3611 [2021-06-05 18:18:44,002 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 364.0ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-06-05 18:18:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2688. [2021-06-05 18:18:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.773725344250093) internal successors, (7453), 2687 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7453 transitions. [2021-06-05 18:18:44,031 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7453 transitions. Word has length 105 [2021-06-05 18:18:44,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:44,031 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 7453 transitions. [2021-06-05 18:18:44,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:44,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7453 transitions. [2021-06-05 18:18:44,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:44,033 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:44,033 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:44,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:18:44,234 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 106 times [2021-06-05 18:18:44,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:44,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909974440] [2021-06-05 18:18:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:44,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909974440] [2021-06-05 18:18:44,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909974440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:44,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125450816] [2021-06-05 18:18:44,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:44,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:44,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:44,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:44,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125450816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:44,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:44,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229822079] [2021-06-05 18:18:44,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:44,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:44,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:44,568 INFO L87 Difference]: Start difference. First operand 2688 states and 7453 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:44,997 INFO L93 Difference]: Finished difference Result 3906 states and 10092 transitions. [2021-06-05 18:18:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:44,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:45,001 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 18:18:45,001 INFO L226 Difference]: Without dead ends: 3636 [2021-06-05 18:18:45,001 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:18:45,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-06-05 18:18:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2763. [2021-06-05 18:18:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.779869659666908) internal successors, (7678), 2762 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 7678 transitions. [2021-06-05 18:18:45,030 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 7678 transitions. Word has length 105 [2021-06-05 18:18:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:45,030 INFO L482 AbstractCegarLoop]: Abstraction has 2763 states and 7678 transitions. [2021-06-05 18:18:45,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 7678 transitions. [2021-06-05 18:18:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:45,032 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:45,032 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:45,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 18:18:45,233 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 107 times [2021-06-05 18:18:45,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:45,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563078913] [2021-06-05 18:18:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:45,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:45,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563078913] [2021-06-05 18:18:45,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563078913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:45,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070146028] [2021-06-05 18:18:45,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:45,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:45,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:45,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070146028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:45,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:45,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:45,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126339542] [2021-06-05 18:18:45,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:45,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:45,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:45,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:45,540 INFO L87 Difference]: Start difference. First operand 2763 states and 7678 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:45,915 INFO L93 Difference]: Finished difference Result 3931 states and 10217 transitions. [2021-06-05 18:18:45,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:45,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:45,919 INFO L225 Difference]: With dead ends: 3931 [2021-06-05 18:18:45,919 INFO L226 Difference]: Without dead ends: 3661 [2021-06-05 18:18:45,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:18:45,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-06-05 18:18:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2838. [2021-06-05 18:18:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 2.785689108212901) internal successors, (7903), 2837 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 7903 transitions. [2021-06-05 18:18:45,948 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 7903 transitions. Word has length 105 [2021-06-05 18:18:45,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:45,948 INFO L482 AbstractCegarLoop]: Abstraction has 2838 states and 7903 transitions. [2021-06-05 18:18:45,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:45,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 7903 transitions. [2021-06-05 18:18:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:45,950 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:45,950 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:46,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:46,153 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:46,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:46,153 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 108 times [2021-06-05 18:18:46,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:46,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832206137] [2021-06-05 18:18:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:46,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:46,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832206137] [2021-06-05 18:18:46,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832206137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828160073] [2021-06-05 18:18:46,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:46,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:46,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:46,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:46,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828160073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:46,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:46,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016958539] [2021-06-05 18:18:46,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:46,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:46,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:46,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:46,507 INFO L87 Difference]: Start difference. First operand 2838 states and 7903 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:46,983 INFO L93 Difference]: Finished difference Result 3956 states and 10342 transitions. [2021-06-05 18:18:46,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:46,984 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:46,987 INFO L225 Difference]: With dead ends: 3956 [2021-06-05 18:18:46,987 INFO L226 Difference]: Without dead ends: 3686 [2021-06-05 18:18:46,988 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:18:46,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-06-05 18:18:47,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2913. [2021-06-05 18:18:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.791208791208791) internal successors, (8128), 2912 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:47,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 8128 transitions. [2021-06-05 18:18:47,017 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 8128 transitions. Word has length 105 [2021-06-05 18:18:47,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:47,017 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 8128 transitions. [2021-06-05 18:18:47,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:47,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 8128 transitions. [2021-06-05 18:18:47,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:47,019 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:47,019 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:47,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 18:18:47,220 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:47,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:47,220 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 109 times [2021-06-05 18:18:47,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:47,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698568873] [2021-06-05 18:18:47,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:47,343 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:47,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:47,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698568873] [2021-06-05 18:18:47,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698568873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:47,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950840149] [2021-06-05 18:18:47,344 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:47,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:47,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950840149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:47,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:47,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:47,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58249339] [2021-06-05 18:18:47,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:47,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:47,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:47,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:47,517 INFO L87 Difference]: Start difference. First operand 2913 states and 8128 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:47,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:47,939 INFO L93 Difference]: Finished difference Result 3981 states and 10467 transitions. [2021-06-05 18:18:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:47,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:47,943 INFO L225 Difference]: With dead ends: 3981 [2021-06-05 18:18:47,943 INFO L226 Difference]: Without dead ends: 3711 [2021-06-05 18:18:47,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 400.8ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:18:47,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-06-05 18:18:47,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2988. [2021-06-05 18:18:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7964512889186475) internal successors, (8353), 2987 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8353 transitions. [2021-06-05 18:18:47,973 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8353 transitions. Word has length 105 [2021-06-05 18:18:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:47,973 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8353 transitions. [2021-06-05 18:18:47,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8353 transitions. [2021-06-05 18:18:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:47,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:47,976 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:48,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:18:48,176 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 110 times [2021-06-05 18:18:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:48,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957492347] [2021-06-05 18:18:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:48,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:48,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957492347] [2021-06-05 18:18:48,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957492347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784908722] [2021-06-05 18:18:48,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:48,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:48,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:48,532 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:48,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784908722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:48,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:48,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676667509] [2021-06-05 18:18:48,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:48,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:48,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:48,533 INFO L87 Difference]: Start difference. First operand 2988 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:49,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:49,063 INFO L93 Difference]: Finished difference Result 4006 states and 10592 transitions. [2021-06-05 18:18:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:18:49,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:49,067 INFO L225 Difference]: With dead ends: 4006 [2021-06-05 18:18:49,067 INFO L226 Difference]: Without dead ends: 3736 [2021-06-05 18:18:49,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:18:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-05 18:18:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3063. [2021-06-05 18:18:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.8014369693011103) internal successors, (8578), 3062 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8578 transitions. [2021-06-05 18:18:49,099 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8578 transitions. Word has length 105 [2021-06-05 18:18:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:49,099 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8578 transitions. [2021-06-05 18:18:49,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:49,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8578 transitions. [2021-06-05 18:18:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:49,101 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:49,101 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:49,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 18:18:49,301 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:49,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:49,302 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 111 times [2021-06-05 18:18:49,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:49,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616889458] [2021-06-05 18:18:49,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:49,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:49,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616889458] [2021-06-05 18:18:49,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616889458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:49,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524516505] [2021-06-05 18:18:49,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:49,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:49,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:49,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:49,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:49,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524516505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:49,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:49,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:49,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434789531] [2021-06-05 18:18:49,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:49,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:49,613 INFO L87 Difference]: Start difference. First operand 3063 states and 8578 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:50,083 INFO L93 Difference]: Finished difference Result 4031 states and 10717 transitions. [2021-06-05 18:18:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:18:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:50,087 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 18:18:50,087 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 18:18:50,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:18:50,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 18:18:50,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3138. [2021-06-05 18:18:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.8061842524705134) internal successors, (8803), 3137 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8803 transitions. [2021-06-05 18:18:50,119 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8803 transitions. Word has length 105 [2021-06-05 18:18:50,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:50,120 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8803 transitions. [2021-06-05 18:18:50,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8803 transitions. [2021-06-05 18:18:50,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:50,122 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:50,122 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:50,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:50,324 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:50,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 112 times [2021-06-05 18:18:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:50,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327900160] [2021-06-05 18:18:50,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:50,446 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:50,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327900160] [2021-06-05 18:18:50,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327900160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:50,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155560193] [2021-06-05 18:18:50,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:50,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:50,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:50,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:50,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155560193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:50,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:50,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:50,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633220727] [2021-06-05 18:18:50,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:50,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:50,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:50,637 INFO L87 Difference]: Start difference. First operand 3138 states and 8803 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:51,205 INFO L93 Difference]: Finished difference Result 4116 states and 11007 transitions. [2021-06-05 18:18:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:18:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:51,209 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 18:18:51,209 INFO L226 Difference]: Without dead ends: 3846 [2021-06-05 18:18:51,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 533.2ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:18:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-06-05 18:18:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 3213. [2021-06-05 18:18:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.816936488169365) internal successors, (9048), 3212 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 9048 transitions. [2021-06-05 18:18:51,246 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 9048 transitions. Word has length 105 [2021-06-05 18:18:51,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:51,246 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 9048 transitions. [2021-06-05 18:18:51,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 9048 transitions. [2021-06-05 18:18:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:51,248 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:51,248 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:51,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:51,449 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:51,449 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 113 times [2021-06-05 18:18:51,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:51,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65550290] [2021-06-05 18:18:51,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:51,567 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65550290] [2021-06-05 18:18:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65550290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440338573] [2021-06-05 18:18:51,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:51,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:51,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:51,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440338573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:51,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:18:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075472675] [2021-06-05 18:18:51,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:51,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:51,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:51,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:51,757 INFO L87 Difference]: Start difference. First operand 3213 states and 9048 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:52,250 INFO L93 Difference]: Finished difference Result 4858 states and 13131 transitions. [2021-06-05 18:18:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:18:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:52,254 INFO L225 Difference]: With dead ends: 4858 [2021-06-05 18:18:52,255 INFO L226 Difference]: Without dead ends: 4588 [2021-06-05 18:18:52,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:18:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-06-05 18:18:52,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3393. [2021-06-05 18:18:52,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 2.832252358490566) internal successors, (9607), 3392 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 9607 transitions. [2021-06-05 18:18:52,290 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 9607 transitions. Word has length 105 [2021-06-05 18:18:52,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:52,291 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 9607 transitions. [2021-06-05 18:18:52,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 9607 transitions. [2021-06-05 18:18:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:18:52,293 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:52,293 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:52,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:52,493 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:52,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:52,494 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 114 times [2021-06-05 18:18:52,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:52,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184307694] [2021-06-05 18:18:52,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:52,612 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:52,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184307694] [2021-06-05 18:18:52,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184307694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:52,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952653420] [2021-06-05 18:18:52,612 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:52,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:52,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:52,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952653420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:52,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:52,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:52,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482912125] [2021-06-05 18:18:52,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:52,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:52,799 INFO L87 Difference]: Start difference. First operand 3393 states and 9607 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:53,456 INFO L93 Difference]: Finished difference Result 4726 states and 12796 transitions. [2021-06-05 18:18:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:18:53,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-06-05 18:18:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:53,460 INFO L225 Difference]: With dead ends: 4726 [2021-06-05 18:18:53,460 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:18:53,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:18:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:18:53,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3428. [2021-06-05 18:18:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-06-05 18:18:53,490 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-06-05 18:18:53,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:53,490 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-06-05 18:18:53,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-06-05 18:18:53,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:53,492 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:53,492 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:53,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 18:18:53,692 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:53,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:53,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 115 times [2021-06-05 18:18:53,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:53,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047609326] [2021-06-05 18:18:53,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:53,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:53,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047609326] [2021-06-05 18:18:53,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047609326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:53,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839104988] [2021-06-05 18:18:53,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:53,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:18:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:54,089 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:54,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839104988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:54,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:54,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 18:18:54,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933410685] [2021-06-05 18:18:54,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:18:54,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:54,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:18:54,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:18:54,090 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:54,468 INFO L93 Difference]: Finished difference Result 4468 states and 12083 transitions. [2021-06-05 18:18:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:54,473 INFO L225 Difference]: With dead ends: 4468 [2021-06-05 18:18:54,473 INFO L226 Difference]: Without dead ends: 4134 [2021-06-05 18:18:54,473 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 409.3ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-06-05 18:18:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3513. [2021-06-05 18:18:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.805523917995444) internal successors, (9853), 3512 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9853 transitions. [2021-06-05 18:18:54,507 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9853 transitions. Word has length 110 [2021-06-05 18:18:54,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:54,507 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9853 transitions. [2021-06-05 18:18:54,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9853 transitions. [2021-06-05 18:18:54,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:54,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:54,510 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:54,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:18:54,710 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:54,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:54,711 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 116 times [2021-06-05 18:18:54,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:54,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765251064] [2021-06-05 18:18:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:54,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765251064] [2021-06-05 18:18:54,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765251064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151997520] [2021-06-05 18:18:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:55,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:55,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:55,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151997520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:55,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:18:55,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512920463] [2021-06-05 18:18:55,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:55,209 INFO L87 Difference]: Start difference. First operand 3513 states and 9853 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:55,500 INFO L93 Difference]: Finished difference Result 5061 states and 13077 transitions. [2021-06-05 18:18:55,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:55,500 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:55,504 INFO L225 Difference]: With dead ends: 5061 [2021-06-05 18:18:55,504 INFO L226 Difference]: Without dead ends: 4791 [2021-06-05 18:18:55,505 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:55,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-06-05 18:18:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3528. [2021-06-05 18:18:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:18:55,539 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:18:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:55,539 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:18:55,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:18:55,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:55,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:55,542 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:55,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 18:18:55,742 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:55,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:55,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 117 times [2021-06-05 18:18:55,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:55,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271182778] [2021-06-05 18:18:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:55,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271182778] [2021-06-05 18:18:55,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271182778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505172661] [2021-06-05 18:18:55,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:55,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:18:55,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:55,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:56,148 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:56,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505172661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:56,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:56,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:18:56,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873558322] [2021-06-05 18:18:56,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:18:56,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:18:56,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:18:56,149 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:56,524 INFO L93 Difference]: Finished difference Result 4946 states and 12847 transitions. [2021-06-05 18:18:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:56,529 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 18:18:56,530 INFO L226 Difference]: Without dead ends: 4676 [2021-06-05 18:18:56,530 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 424.1ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-06-05 18:18:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3528. [2021-06-05 18:18:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:18:56,577 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:18:56,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:56,578 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:18:56,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:56,578 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:18:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:56,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:56,580 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:56,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:18:56,781 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:56,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:56,781 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 118 times [2021-06-05 18:18:56,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:56,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811576187] [2021-06-05 18:18:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:56,933 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:56,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:56,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811576187] [2021-06-05 18:18:56,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811576187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:56,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364077212] [2021-06-05 18:18:56,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:56,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:56,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:56,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:56,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:57,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364077212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:57,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:57,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:18:57,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153610557] [2021-06-05 18:18:57,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:57,151 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:57,472 INFO L93 Difference]: Finished difference Result 4921 states and 12797 transitions. [2021-06-05 18:18:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:57,472 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:57,477 INFO L225 Difference]: With dead ends: 4921 [2021-06-05 18:18:57,477 INFO L226 Difference]: Without dead ends: 4651 [2021-06-05 18:18:57,478 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:57,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-05 18:18:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3528. [2021-06-05 18:18:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:18:57,516 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:18:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:57,516 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:18:57,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:18:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:57,519 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:57,519 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:57,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 18:18:57,720 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:57,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:57,720 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 119 times [2021-06-05 18:18:57,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:57,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868502718] [2021-06-05 18:18:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:57,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:57,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868502718] [2021-06-05 18:18:57,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868502718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:57,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64523439] [2021-06-05 18:18:57,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:57,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:18:57,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:57,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:57,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:58,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64523439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:58,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:58,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:18:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314775347] [2021-06-05 18:18:58,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:18:58,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:58,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:18:58,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:18:58,090 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:58,525 INFO L93 Difference]: Finished difference Result 4871 states and 12697 transitions. [2021-06-05 18:18:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:58,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:58,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:58,530 INFO L225 Difference]: With dead ends: 4871 [2021-06-05 18:18:58,530 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 18:18:58,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 446.3ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 18:18:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3528. [2021-06-05 18:18:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:58,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:18:58,570 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:18:58,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:58,570 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:18:58,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:58,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:18:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:58,573 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:58,574 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:58,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:58,775 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:58,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:58,775 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 120 times [2021-06-05 18:18:58,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:58,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772063329] [2021-06-05 18:18:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:58,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772063329] [2021-06-05 18:18:58,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772063329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:58,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358225689] [2021-06-05 18:18:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:58,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:18:58,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:58,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:58,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358225689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:59,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:59,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:18:59,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547428865] [2021-06-05 18:18:59,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:59,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:59,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:59,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:59,114 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:59,489 INFO L93 Difference]: Finished difference Result 4821 states and 12597 transitions. [2021-06-05 18:18:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:18:59,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:59,495 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 18:18:59,495 INFO L226 Difference]: Without dead ends: 4551 [2021-06-05 18:18:59,495 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-05 18:18:59,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3528. [2021-06-05 18:18:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:18:59,534 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:18:59,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:59,534 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:18:59,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:18:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:18:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:18:59,537 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:59,537 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:18:59,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 18:18:59,754 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:59,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:59,755 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 121 times [2021-06-05 18:18:59,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:59,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240952501] [2021-06-05 18:18:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:59,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240952501] [2021-06-05 18:18:59,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240952501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:59,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833164494] [2021-06-05 18:18:59,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:18:59,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833164494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:00,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:00,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668021224] [2021-06-05 18:19:00,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:00,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:00,164 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,625 INFO L93 Difference]: Finished difference Result 4771 states and 12497 transitions. [2021-06-05 18:19:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:00,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,630 INFO L225 Difference]: With dead ends: 4771 [2021-06-05 18:19:00,630 INFO L226 Difference]: Without dead ends: 4501 [2021-06-05 18:19:00,630 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 475.7ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-06-05 18:19:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 3528. [2021-06-05 18:19:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:00,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:00,663 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:00,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,663 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:00,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:00,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,666 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:00,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:19:00,877 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,877 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 122 times [2021-06-05 18:19:00,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326622271] [2021-06-05 18:19:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:01,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326622271] [2021-06-05 18:19:01,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326622271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109371584] [2021-06-05 18:19:01,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:01,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:01,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:01,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109371584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:01,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:01,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358891269] [2021-06-05 18:19:01,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:01,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:01,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:01,205 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:01,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:01,595 INFO L93 Difference]: Finished difference Result 4721 states and 12397 transitions. [2021-06-05 18:19:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:01,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:01,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:01,600 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:19:01,600 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:19:01,600 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:01,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:19:01,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3528. [2021-06-05 18:19:01,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:01,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:01,645 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:01,645 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:01,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:01,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:01,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:01,648 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:01,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:01,857 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 123 times [2021-06-05 18:19:01,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:01,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317566333] [2021-06-05 18:19:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317566333] [2021-06-05 18:19:02,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317566333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143780366] [2021-06-05 18:19:02,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:02,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:02,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:02,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143780366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:02,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409772558] [2021-06-05 18:19:02,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:02,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:02,219 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:02,726 INFO L93 Difference]: Finished difference Result 4671 states and 12297 transitions. [2021-06-05 18:19:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:02,731 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 18:19:02,731 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 18:19:02,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 516.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:02,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 18:19:02,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3528. [2021-06-05 18:19:02,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:02,765 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:02,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:02,765 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:02,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:02,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:02,768 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:02,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:02,968 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:02,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 124 times [2021-06-05 18:19:02,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:02,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544332094] [2021-06-05 18:19:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544332094] [2021-06-05 18:19:03,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544332094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925216208] [2021-06-05 18:19:03,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:03,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:03,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:03,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925216208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:03,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:03,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610277312] [2021-06-05 18:19:03,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:03,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:03,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:03,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:03,298 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:03,745 INFO L93 Difference]: Finished difference Result 4621 states and 12197 transitions. [2021-06-05 18:19:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:03,750 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 18:19:03,750 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 18:19:03,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 18:19:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3528. [2021-06-05 18:19:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:03,785 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:03,785 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:03,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:03,788 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:03,788 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:03,988 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 125 times [2021-06-05 18:19:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102142753] [2021-06-05 18:19:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102142753] [2021-06-05 18:19:04,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102142753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364939849] [2021-06-05 18:19:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:04,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364939849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164666105] [2021-06-05 18:19:04,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:04,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:04,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:04,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:04,337 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:04,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:04,899 INFO L93 Difference]: Finished difference Result 4571 states and 12097 transitions. [2021-06-05 18:19:04,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:04,900 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:04,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:04,904 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 18:19:04,904 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 18:19:04,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:04,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 18:19:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3528. [2021-06-05 18:19:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:04,940 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:04,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:04,940 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:04,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:04,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:04,943 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:05,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:19:05,143 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 126 times [2021-06-05 18:19:05,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:05,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838771843] [2021-06-05 18:19:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:05,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:05,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838771843] [2021-06-05 18:19:05,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838771843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:05,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320091294] [2021-06-05 18:19:05,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:05,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:05,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:05,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:05,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:05,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320091294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:05,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:05,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:05,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192267678] [2021-06-05 18:19:05,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:05,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:05,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:05,524 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:06,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:06,040 INFO L93 Difference]: Finished difference Result 4521 states and 11997 transitions. [2021-06-05 18:19:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:06,045 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 18:19:06,045 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 18:19:06,046 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 18:19:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3528. [2021-06-05 18:19:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:06,084 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:06,084 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:06,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:06,087 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:06,088 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:06,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:19:06,301 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:06,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:06,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 127 times [2021-06-05 18:19:06,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:06,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792044285] [2021-06-05 18:19:06,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:06,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792044285] [2021-06-05 18:19:06,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792044285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156565141] [2021-06-05 18:19:06,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:06,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156565141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:06,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:06,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617788416] [2021-06-05 18:19:06,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:06,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:06,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:06,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:06,651 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:07,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:07,373 INFO L93 Difference]: Finished difference Result 4471 states and 11897 transitions. [2021-06-05 18:19:07,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:07,373 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:07,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:07,377 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:19:07,377 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:19:07,377 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 687.6ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:07,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:19:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3528. [2021-06-05 18:19:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:07,415 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:07,416 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:07,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:07,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:07,419 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:07,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:07,637 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:07,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 128 times [2021-06-05 18:19:07,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:07,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013801194] [2021-06-05 18:19:07,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:07,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013801194] [2021-06-05 18:19:07,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013801194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725636235] [2021-06-05 18:19:07,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:07,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:07,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:07,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:07,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725636235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:07,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:07,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804816683] [2021-06-05 18:19:07,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:07,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:07,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:07,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:07,963 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:08,504 INFO L93 Difference]: Finished difference Result 4421 states and 11797 transitions. [2021-06-05 18:19:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:08,509 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 18:19:08,509 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:19:08,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 514.7ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:19:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3528. [2021-06-05 18:19:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-06-05 18:19:08,545 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-06-05 18:19:08,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:08,545 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-06-05 18:19:08,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:08,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-06-05 18:19:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:08,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:08,548 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:08,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:19:08,748 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:08,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:08,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 129 times [2021-06-05 18:19:08,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:08,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42357736] [2021-06-05 18:19:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:08,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:08,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42357736] [2021-06-05 18:19:08,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42357736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001999856] [2021-06-05 18:19:08,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:09,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:09,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:09,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:09,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001999856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:09,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:09,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062329803] [2021-06-05 18:19:09,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:09,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:09,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:09,182 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:09,845 INFO L93 Difference]: Finished difference Result 4431 states and 11847 transitions. [2021-06-05 18:19:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:09,845 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:09,849 INFO L225 Difference]: With dead ends: 4431 [2021-06-05 18:19:09,849 INFO L226 Difference]: Without dead ends: 4161 [2021-06-05 18:19:09,849 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 643.4ms TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:19:09,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-06-05 18:19:09,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3528. [2021-06-05 18:19:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 18:19:09,880 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 18:19:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:09,880 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 18:19:09,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:09,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 18:19:09,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:09,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:09,883 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:10,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:19:10,085 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:10,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 130 times [2021-06-05 18:19:10,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:10,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760920337] [2021-06-05 18:19:10,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:10,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:10,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760920337] [2021-06-05 18:19:10,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760920337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51739330] [2021-06-05 18:19:10,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:10,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:10,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:10,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51739330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:10,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:10,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126564935] [2021-06-05 18:19:10,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:10,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:10,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:10,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:10,389 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:10,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:10,911 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 18:19:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:10,916 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 18:19:10,916 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 18:19:10,917 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:10,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 18:19:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 18:19:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 18:19:10,952 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 18:19:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:10,952 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 18:19:10,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 18:19:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:10,954 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:10,954 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:11,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 18:19:11,155 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:11,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:11,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 131 times [2021-06-05 18:19:11,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:11,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254151469] [2021-06-05 18:19:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:11,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254151469] [2021-06-05 18:19:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254151469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14817699] [2021-06-05 18:19:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:11,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:11,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:11,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:11,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14817699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:11,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:11,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106503344] [2021-06-05 18:19:11,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:11,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:11,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:11,498 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:12,227 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 18:19:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:19:12,227 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-06-05 18:19:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:12,232 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:19:12,232 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 18:19:12,232 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 677.3ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:19:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 18:19:12,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 18:19:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 18:19:12,263 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 18:19:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:12,264 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 18:19:12,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 18:19:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:12,265 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,265 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:12,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,466 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 132 times [2021-06-05 18:19:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622783500] [2021-06-05 18:19:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622783500] [2021-06-05 18:19:12,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622783500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335858678] [2021-06-05 18:19:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:12,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:12,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335858678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:12,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:12,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483164440] [2021-06-05 18:19:12,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:12,827 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:13,156 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 18:19:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:13,160 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:19:13,160 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 18:19:13,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 18:19:13,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 18:19:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 18:19:13,187 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 18:19:13,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:13,187 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 18:19:13,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:13,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 18:19:13,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:13,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:13,189 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:13,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,390 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:13,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:13,390 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 133 times [2021-06-05 18:19:13,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:13,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304418382] [2021-06-05 18:19:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:13,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304418382] [2021-06-05 18:19:13,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304418382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897584473] [2021-06-05 18:19:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897584473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:13,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259650803] [2021-06-05 18:19:13,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:13,796 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,175 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 18:19:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:14,178 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 18:19:14,179 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 18:19:14,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 431.0ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 18:19:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 18:19:14,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 18:19:14,204 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 18:19:14,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:14,204 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 18:19:14,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 18:19:14,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:14,206 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:14,206 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:14,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:14,407 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:14,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 134 times [2021-06-05 18:19:14,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:14,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523350640] [2021-06-05 18:19:14,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523350640] [2021-06-05 18:19:14,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523350640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135071603] [2021-06-05 18:19:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:14,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:14,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:14,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:14,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135071603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:14,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:14,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477636673] [2021-06-05 18:19:14,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:14,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:14,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:14,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:14,754 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:15,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:15,114 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 18:19:15,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:15,114 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:15,118 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:19:15,118 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:19:15,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:19:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 18:19:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 18:19:15,148 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 18:19:15,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:15,149 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 18:19:15,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 18:19:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:15,151 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:15,151 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:15,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-06-05 18:19:15,351 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:15,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 135 times [2021-06-05 18:19:15,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:15,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888646420] [2021-06-05 18:19:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888646420] [2021-06-05 18:19:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888646420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965057852] [2021-06-05 18:19:15,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:15,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:15,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:15,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:15,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:15,734 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965057852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:15,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:15,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993783519] [2021-06-05 18:19:15,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:15,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:15,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:15,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:15,735 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:16,168 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 18:19:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:16,172 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:19:16,172 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:19:16,172 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 456.7ms TimeCoverageRelationStatistics Valid=553, Invalid=1799, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:19:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 18:19:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 18:19:16,202 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 18:19:16,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:16,202 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 18:19:16,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:16,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 18:19:16,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:16,204 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:16,204 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:16,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:16,405 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:16,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:16,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 136 times [2021-06-05 18:19:16,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:16,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612713932] [2021-06-05 18:19:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:16,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612713932] [2021-06-05 18:19:16,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612713932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557613781] [2021-06-05 18:19:16,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:16,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:16,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:16,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557613781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243862695] [2021-06-05 18:19:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:16,736 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:17,131 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 18:19:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:17,135 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:19:17,135 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:19:17,136 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 401.3ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:19:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 18:19:17,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 18:19:17,166 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 18:19:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:17,166 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 18:19:17,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 18:19:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:17,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:17,168 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:17,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:19:17,369 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 137 times [2021-06-05 18:19:17,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:17,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295539008] [2021-06-05 18:19:17,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,547 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:17,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295539008] [2021-06-05 18:19:17,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295539008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823345702] [2021-06-05 18:19:17,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:17,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:17,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:17,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823345702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:17,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773939207] [2021-06-05 18:19:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:17,785 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:18,286 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 18:19:18,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:18,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:18,290 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:19:18,290 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:19:18,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 516.4ms TimeCoverageRelationStatistics Valid=593, Invalid=1957, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:18,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:19:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 18:19:18,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 18:19:18,321 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 18:19:18,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:18,321 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 18:19:18,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 18:19:18,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:18,323 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:18,324 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:18,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:18,524 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:18,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 138 times [2021-06-05 18:19:18,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:18,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318932788] [2021-06-05 18:19:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:18,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318932788] [2021-06-05 18:19:18,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318932788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055629861] [2021-06-05 18:19:18,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:18,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:18,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055629861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:18,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:18,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496580113] [2021-06-05 18:19:18,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:18,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:18,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:18,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:18,875 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:19,317 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 18:19:19,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:19,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:19,321 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 18:19:19,321 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 18:19:19,321 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 18:19:19,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 18:19:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:19,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 18:19:19,353 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 18:19:19,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:19,353 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 18:19:19,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:19,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 18:19:19,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:19,355 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:19,356 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:19,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:19:19,556 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 139 times [2021-06-05 18:19:19,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:19,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494554276] [2021-06-05 18:19:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:19,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494554276] [2021-06-05 18:19:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494554276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253735227] [2021-06-05 18:19:19,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:19,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:19,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253735227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:19,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:19,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960926511] [2021-06-05 18:19:19,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:19,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:19,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:19,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:19,922 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:20,461 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 18:19:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:20,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:20,465 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:19:20,465 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:19:20,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=649, Invalid=2107, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:19:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 18:19:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 18:19:20,500 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 18:19:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:20,500 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 18:19:20,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 18:19:20,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:20,502 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:20,502 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:20,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:19:20,703 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:20,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:20,703 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 140 times [2021-06-05 18:19:20,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:20,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307289374] [2021-06-05 18:19:20,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:20,845 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307289374] [2021-06-05 18:19:20,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307289374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948295500] [2021-06-05 18:19:20,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:20,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:20,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:20,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:20,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948295500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:21,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:21,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544378892] [2021-06-05 18:19:21,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:21,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:21,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:21,034 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:21,496 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 18:19:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:21,501 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 18:19:21,501 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:19:21,501 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:19:21,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 18:19:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 18:19:21,550 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 18:19:21,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:21,550 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 18:19:21,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:21,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 18:19:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:21,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:21,552 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:21,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:21,757 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:21,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:21,757 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 141 times [2021-06-05 18:19:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:21,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473970619] [2021-06-05 18:19:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:21,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:21,912 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:21,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473970619] [2021-06-05 18:19:21,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473970619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121149730] [2021-06-05 18:19:21,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:21,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:21,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:21,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:21,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:22,128 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:22,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121149730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:22,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:22,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892056054] [2021-06-05 18:19:22,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:22,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:22,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:22,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:22,129 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:22,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:22,713 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 18:19:22,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:22,714 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:22,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:22,718 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:19:22,718 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:19:22,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 569.4ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:22,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:19:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 18:19:22,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 18:19:22,753 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 18:19:22,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:22,753 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 18:19:22,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 18:19:22,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:22,756 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:22,756 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:22,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 18:19:22,959 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:22,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:22,959 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 142 times [2021-06-05 18:19:22,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:22,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603271142] [2021-06-05 18:19:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:23,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603271142] [2021-06-05 18:19:23,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603271142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379527094] [2021-06-05 18:19:23,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:23,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:23,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:23,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:23,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:23,285 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379527094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:23,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:23,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351948720] [2021-06-05 18:19:23,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:23,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:23,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:23,286 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:23,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:23,789 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 18:19:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:23,790 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:23,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:23,794 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:19:23,794 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:19:23,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:19:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 18:19:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:23,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 18:19:23,832 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 18:19:23,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:23,832 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 18:19:23,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 18:19:23,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:23,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:23,835 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:24,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,036 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:24,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:24,036 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 143 times [2021-06-05 18:19:24,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:24,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350921251] [2021-06-05 18:19:24,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350921251] [2021-06-05 18:19:24,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350921251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684562620] [2021-06-05 18:19:24,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:24,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:24,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:24,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:24,390 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684562620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:24,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:24,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979188594] [2021-06-05 18:19:24,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:24,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:24,391 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:25,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:25,017 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 18:19:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:25,017 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:25,021 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:19:25,021 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:19:25,022 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=809, Invalid=2383, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:19:25,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:19:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 18:19:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 18:19:25,060 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 18:19:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:25,060 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 18:19:25,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 18:19:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:25,063 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:25,063 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:25,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:25,263 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:25,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 144 times [2021-06-05 18:19:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:25,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598894309] [2021-06-05 18:19:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598894309] [2021-06-05 18:19:25,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598894309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550201840] [2021-06-05 18:19:25,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:25,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:25,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:25,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550201840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:25,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558013031] [2021-06-05 18:19:25,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:25,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:25,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:25,594 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:26,134 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 18:19:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:19:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:26,139 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 18:19:26,139 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 18:19:26,139 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 500.1ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:19:26,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 18:19:26,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 18:19:26,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 18:19:26,177 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 18:19:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:26,177 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 18:19:26,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 18:19:26,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:26,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:26,180 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:26,381 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 145 times [2021-06-05 18:19:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786074193] [2021-06-05 18:19:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:26,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786074193] [2021-06-05 18:19:26,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786074193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911751223] [2021-06-05 18:19:26,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:26,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:26,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911751223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:26,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:26,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112480857] [2021-06-05 18:19:26,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:26,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:26,717 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:27,433 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 18:19:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:19:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:27,438 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 18:19:27,438 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:19:27,439 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 650.8ms TimeCoverageRelationStatistics Valid=934, Invalid=2726, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:19:27,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:19:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 18:19:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:27,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 18:19:27,477 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 18:19:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:27,477 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 18:19:27,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 18:19:27,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:27,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:27,480 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:27,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:27,689 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 146 times [2021-06-05 18:19:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:27,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936832745] [2021-06-05 18:19:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:27,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936832745] [2021-06-05 18:19:27,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936832745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396015433] [2021-06-05 18:19:27,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:27,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:27,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396015433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:28,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-06-05 18:19:28,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197732035] [2021-06-05 18:19:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:28,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:28,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:28,021 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:28,577 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 18:19:28,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:28,577 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:28,582 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 18:19:28,582 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 18:19:28,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:19:28,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 18:19:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 18:19:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:28,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 18:19:28,622 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 18:19:28,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:28,622 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 18:19:28,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:28,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 18:19:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:28,625 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:28,625 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:28,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-06-05 18:19:28,825 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:28,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:28,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 147 times [2021-06-05 18:19:28,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:28,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476571776] [2021-06-05 18:19:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476571776] [2021-06-05 18:19:28,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476571776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003878283] [2021-06-05 18:19:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:29,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:29,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:29,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:29,153 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003878283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:29,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:29,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404926288] [2021-06-05 18:19:29,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:29,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:29,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:29,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:29,154 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:29,862 INFO L93 Difference]: Finished difference Result 4810 states and 13121 transitions. [2021-06-05 18:19:29,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-06-05 18:19:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:29,867 INFO L225 Difference]: With dead ends: 4810 [2021-06-05 18:19:29,867 INFO L226 Difference]: Without dead ends: 4321 [2021-06-05 18:19:29,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 671.1ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:19:29,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2021-06-05 18:19:29,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3778. [2021-06-05 18:19:29,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3778 states, 3777 states have (on average 2.8284352660841936) internal successors, (10683), 3777 states have internal predecessors, (10683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3778 states to 3778 states and 10683 transitions. [2021-06-05 18:19:29,901 INFO L78 Accepts]: Start accepts. Automaton has 3778 states and 10683 transitions. Word has length 115 [2021-06-05 18:19:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:29,901 INFO L482 AbstractCegarLoop]: Abstraction has 3778 states and 10683 transitions. [2021-06-05 18:19:29,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3778 states and 10683 transitions. [2021-06-05 18:19:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:29,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:29,904 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:30,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 18:19:30,105 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:30,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:30,105 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 148 times [2021-06-05 18:19:30,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:30,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828264139] [2021-06-05 18:19:30,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828264139] [2021-06-05 18:19:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828264139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011348193] [2021-06-05 18:19:30,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:30,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:30,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:30,581 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011348193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:30,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:19:30,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645411970] [2021-06-05 18:19:30,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:19:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:30,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:19:30,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:19:30,582 INFO L87 Difference]: Start difference. First operand 3778 states and 10683 transitions. Second operand has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:30,979 INFO L93 Difference]: Finished difference Result 4868 states and 13183 transitions. [2021-06-05 18:19:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:30,984 INFO L225 Difference]: With dead ends: 4868 [2021-06-05 18:19:30,984 INFO L226 Difference]: Without dead ends: 4534 [2021-06-05 18:19:30,984 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:30,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4534 states. [2021-06-05 18:19:31,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4534 to 3863. [2021-06-05 18:19:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 2.810201967892284) internal successors, (10853), 3862 states have internal predecessors, (10853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 10853 transitions. [2021-06-05 18:19:31,020 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 10853 transitions. Word has length 120 [2021-06-05 18:19:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:31,020 INFO L482 AbstractCegarLoop]: Abstraction has 3863 states and 10853 transitions. [2021-06-05 18:19:31,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.6923076923076925) internal successors, (148), 26 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 10853 transitions. [2021-06-05 18:19:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:31,023 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,023 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:31,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:19:31,224 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 149 times [2021-06-05 18:19:31,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:31,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949807862] [2021-06-05 18:19:31,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:31,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:31,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949807862] [2021-06-05 18:19:31,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949807862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559289026] [2021-06-05 18:19:31,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:31,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:31,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:31,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:31,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559289026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:31,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734420470] [2021-06-05 18:19:31,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:31,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:31,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:31,610 INFO L87 Difference]: Start difference. First operand 3863 states and 10853 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:31,937 INFO L93 Difference]: Finished difference Result 5561 states and 14377 transitions. [2021-06-05 18:19:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:31,937 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:31,942 INFO L225 Difference]: With dead ends: 5561 [2021-06-05 18:19:31,942 INFO L226 Difference]: Without dead ends: 5291 [2021-06-05 18:19:31,942 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5291 states. [2021-06-05 18:19:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5291 to 3878. [2021-06-05 18:19:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:31,979 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:31,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:31,979 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:31,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:31,982 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,982 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:32,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 18:19:32,182 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 150 times [2021-06-05 18:19:32,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:32,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024015683] [2021-06-05 18:19:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:32,384 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024015683] [2021-06-05 18:19:32,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024015683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995503875] [2021-06-05 18:19:32,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:32,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:32,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:32,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:32,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995503875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:32,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:32,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526945262] [2021-06-05 18:19:32,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:32,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:32,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:32,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:32,597 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:32,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:32,991 INFO L93 Difference]: Finished difference Result 5446 states and 14147 transitions. [2021-06-05 18:19:32,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:32,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:32,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:32,996 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:19:32,996 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:19:32,997 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=575, Invalid=1681, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:19:33,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 3878. [2021-06-05 18:19:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:33,032 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:33,032 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:33,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:33,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:33,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:33,035 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:33,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:19:33,236 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:33,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:33,236 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 151 times [2021-06-05 18:19:33,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:33,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96472452] [2021-06-05 18:19:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:33,406 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96472452] [2021-06-05 18:19:33,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96472452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527114407] [2021-06-05 18:19:33,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:33,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527114407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:33,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:33,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572484999] [2021-06-05 18:19:33,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:33,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:33,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:33,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:33,636 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:33,987 INFO L93 Difference]: Finished difference Result 5421 states and 14097 transitions. [2021-06-05 18:19:33,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:33,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,993 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 18:19:33,993 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 18:19:33,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 385.9ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:33,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 18:19:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3878. [2021-06-05 18:19:34,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:34,035 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:34,035 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:34,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:34,038 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:34,039 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:34,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 18:19:34,239 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:34,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:34,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 152 times [2021-06-05 18:19:34,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:34,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357108336] [2021-06-05 18:19:34,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:34,426 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357108336] [2021-06-05 18:19:34,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357108336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319541120] [2021-06-05 18:19:34,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:34,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319541120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:34,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:34,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619442242] [2021-06-05 18:19:34,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:34,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:34,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:34,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:34,632 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:35,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:35,069 INFO L93 Difference]: Finished difference Result 5371 states and 13997 transitions. [2021-06-05 18:19:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:35,074 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 18:19:35,074 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 18:19:35,075 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 481.7ms TimeCoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:35,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 18:19:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 3878. [2021-06-05 18:19:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:35,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:35,112 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:35,112 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:35,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:35,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:35,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:35,115 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:35,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:35,316 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:35,316 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 153 times [2021-06-05 18:19:35,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:35,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007514653] [2021-06-05 18:19:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007514653] [2021-06-05 18:19:35,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007514653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138384474] [2021-06-05 18:19:35,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:35,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:35,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:35,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138384474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:35,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:35,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853927158] [2021-06-05 18:19:35,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:35,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:35,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:35,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:35,710 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:36,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:36,113 INFO L93 Difference]: Finished difference Result 5321 states and 13897 transitions. [2021-06-05 18:19:36,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:36,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:36,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:36,119 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 18:19:36,119 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 18:19:36,119 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 18:19:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3878. [2021-06-05 18:19:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:36,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:36,156 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:36,156 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:36,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:36,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:36,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:36,159 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:36,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:36,365 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 154 times [2021-06-05 18:19:36,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:36,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322321148] [2021-06-05 18:19:36,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322321148] [2021-06-05 18:19:36,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322321148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175345652] [2021-06-05 18:19:36,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:36,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:36,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:36,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:36,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175345652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:36,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:36,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707910978] [2021-06-05 18:19:36,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:36,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:36,756 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:37,247 INFO L93 Difference]: Finished difference Result 5271 states and 13797 transitions. [2021-06-05 18:19:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:37,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:37,253 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 18:19:37,253 INFO L226 Difference]: Without dead ends: 5001 [2021-06-05 18:19:37,253 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=621, Invalid=2031, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:37,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-05 18:19:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 3878. [2021-06-05 18:19:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:37,292 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:37,293 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:37,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:37,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:37,296 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:37,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:37,496 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:37,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 155 times [2021-06-05 18:19:37,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:37,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971002750] [2021-06-05 18:19:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:37,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971002750] [2021-06-05 18:19:37,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971002750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624020964] [2021-06-05 18:19:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:37,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:37,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:37,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:37,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624020964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:37,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:37,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836431709] [2021-06-05 18:19:37,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:37,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:37,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:37,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:37,887 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:38,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:38,355 INFO L93 Difference]: Finished difference Result 5221 states and 13697 transitions. [2021-06-05 18:19:38,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:38,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:38,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:38,360 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 18:19:38,360 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 18:19:38,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 18:19:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 3878. [2021-06-05 18:19:38,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:38,399 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:38,399 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:38,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:38,402 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:38,402 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:38,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:38,603 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:38,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:38,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 156 times [2021-06-05 18:19:38,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:38,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258597052] [2021-06-05 18:19:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:38,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:38,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258597052] [2021-06-05 18:19:38,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258597052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220225132] [2021-06-05 18:19:38,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:38,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:38,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:38,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220225132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:38,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:38,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64246917] [2021-06-05 18:19:38,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:38,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:38,988 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:39,569 INFO L93 Difference]: Finished difference Result 5171 states and 13597 transitions. [2021-06-05 18:19:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:39,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:39,573 INFO L225 Difference]: With dead ends: 5171 [2021-06-05 18:19:39,573 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 18:19:39,574 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 570.1ms TimeCoverageRelationStatistics Valid=668, Invalid=2194, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:39,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 18:19:39,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3878. [2021-06-05 18:19:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:39,613 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:39,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:39,613 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:39,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:39,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:39,616 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:39,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:39,817 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:39,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:39,817 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 157 times [2021-06-05 18:19:39,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:39,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222642545] [2021-06-05 18:19:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:39,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:39,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222642545] [2021-06-05 18:19:39,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222642545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712442319] [2021-06-05 18:19:39,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:40,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:40,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:40,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712442319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:40,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:40,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:40,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350971010] [2021-06-05 18:19:40,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:40,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:40,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:40,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:40,163 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:40,666 INFO L93 Difference]: Finished difference Result 5121 states and 13497 transitions. [2021-06-05 18:19:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:40,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:40,671 INFO L225 Difference]: With dead ends: 5121 [2021-06-05 18:19:40,671 INFO L226 Difference]: Without dead ends: 4851 [2021-06-05 18:19:40,672 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 468.2ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-05 18:19:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 3878. [2021-06-05 18:19:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:40,712 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:40,713 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:40,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:40,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:40,716 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:40,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:40,916 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:40,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:40,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 158 times [2021-06-05 18:19:40,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:40,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320253978] [2021-06-05 18:19:40,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320253978] [2021-06-05 18:19:41,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320253978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776181124] [2021-06-05 18:19:41,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:41,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:41,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:41,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776181124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:41,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:41,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813153999] [2021-06-05 18:19:41,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:41,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:41,287 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:41,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:41,928 INFO L93 Difference]: Finished difference Result 5071 states and 13397 transitions. [2021-06-05 18:19:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:41,933 INFO L225 Difference]: With dead ends: 5071 [2021-06-05 18:19:41,933 INFO L226 Difference]: Without dead ends: 4801 [2021-06-05 18:19:41,934 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=731, Invalid=2349, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:19:41,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4801 states. [2021-06-05 18:19:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4801 to 3878. [2021-06-05 18:19:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:41,971 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:41,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:41,972 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:41,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:41,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:41,975 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:41,975 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:42,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:42,177 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:42,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 159 times [2021-06-05 18:19:42,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:42,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93202145] [2021-06-05 18:19:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:42,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:42,334 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93202145] [2021-06-05 18:19:42,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93202145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401004265] [2021-06-05 18:19:42,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:42,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:42,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:42,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:42,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401004265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:42,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:42,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877323634] [2021-06-05 18:19:42,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:42,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:42,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:42,527 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:43,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:43,021 INFO L93 Difference]: Finished difference Result 5021 states and 13297 transitions. [2021-06-05 18:19:43,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:43,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:43,026 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:19:43,026 INFO L226 Difference]: Without dead ends: 4751 [2021-06-05 18:19:43,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 486.1ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4751 states. [2021-06-05 18:19:43,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4751 to 3878. [2021-06-05 18:19:43,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:43,067 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:43,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:43,067 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:43,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:43,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:43,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:43,070 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:43,070 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:43,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 18:19:43,270 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:43,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:43,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 160 times [2021-06-05 18:19:43,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:43,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313671129] [2021-06-05 18:19:43,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:43,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313671129] [2021-06-05 18:19:43,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313671129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461046585] [2021-06-05 18:19:43,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:43,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:43,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:43,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461046585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:43,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:43,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947455833] [2021-06-05 18:19:43,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:43,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:43,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:43,650 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:44,319 INFO L93 Difference]: Finished difference Result 4971 states and 13197 transitions. [2021-06-05 18:19:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:44,325 INFO L225 Difference]: With dead ends: 4971 [2021-06-05 18:19:44,325 INFO L226 Difference]: Without dead ends: 4701 [2021-06-05 18:19:44,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 630.2ms TimeCoverageRelationStatistics Valid=810, Invalid=2496, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:19:44,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2021-06-05 18:19:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 3878. [2021-06-05 18:19:44,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:44,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:44,363 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:44,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:44,363 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:44,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:44,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:44,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:44,366 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:44,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 18:19:44,580 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:44,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:44,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 161 times [2021-06-05 18:19:44,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:44,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557229395] [2021-06-05 18:19:44,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:44,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:44,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557229395] [2021-06-05 18:19:44,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557229395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610710596] [2021-06-05 18:19:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:44,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:44,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:44,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:44,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610710596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:44,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:44,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:44,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302899] [2021-06-05 18:19:44,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:44,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:44,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:44,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:44,919 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:45,483 INFO L93 Difference]: Finished difference Result 4921 states and 13097 transitions. [2021-06-05 18:19:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:45,487 INFO L225 Difference]: With dead ends: 4921 [2021-06-05 18:19:45,487 INFO L226 Difference]: Without dead ends: 4651 [2021-06-05 18:19:45,488 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 536.8ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:19:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-06-05 18:19:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3878. [2021-06-05 18:19:45,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:45,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:45,525 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:45,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:45,525 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:45,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:45,525 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:45,528 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:45,528 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:45,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 18:19:45,729 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 162 times [2021-06-05 18:19:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:45,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428905782] [2021-06-05 18:19:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428905782] [2021-06-05 18:19:45,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428905782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82704664] [2021-06-05 18:19:45,886 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:45,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:45,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:46,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82704664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:46,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:46,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936957198] [2021-06-05 18:19:46,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:46,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:46,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:46,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:46,092 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:46,805 INFO L93 Difference]: Finished difference Result 4871 states and 12997 transitions. [2021-06-05 18:19:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:19:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:46,810 INFO L225 Difference]: With dead ends: 4871 [2021-06-05 18:19:46,810 INFO L226 Difference]: Without dead ends: 4601 [2021-06-05 18:19:46,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 679.2ms TimeCoverageRelationStatistics Valid=905, Invalid=2635, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:19:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-05 18:19:46,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3878. [2021-06-05 18:19:46,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:46,849 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:46,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:46,849 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:46,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:46,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:46,852 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:46,852 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:47,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:47,053 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 163 times [2021-06-05 18:19:47,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:47,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214687684] [2021-06-05 18:19:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:47,205 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:47,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214687684] [2021-06-05 18:19:47,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214687684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950769031] [2021-06-05 18:19:47,206 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:47,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:47,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950769031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:47,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:47,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686050832] [2021-06-05 18:19:47,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:47,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:47,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:47,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:47,407 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:47,963 INFO L93 Difference]: Finished difference Result 4821 states and 12897 transitions. [2021-06-05 18:19:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:19:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:47,968 INFO L225 Difference]: With dead ends: 4821 [2021-06-05 18:19:47,968 INFO L226 Difference]: Without dead ends: 4551 [2021-06-05 18:19:47,969 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 539.4ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:19:47,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-06-05 18:19:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3878. [2021-06-05 18:19:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8070673200928553) internal successors, (10883), 3877 states have internal predecessors, (10883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10883 transitions. [2021-06-05 18:19:48,006 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10883 transitions. Word has length 120 [2021-06-05 18:19:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:48,006 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10883 transitions. [2021-06-05 18:19:48,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:48,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10883 transitions. [2021-06-05 18:19:48,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:48,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:48,009 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:48,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 18:19:48,210 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:48,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:48,210 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 164 times [2021-06-05 18:19:48,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:48,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307041290] [2021-06-05 18:19:48,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307041290] [2021-06-05 18:19:48,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307041290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115940600] [2021-06-05 18:19:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:48,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:48,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:48,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:48,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115940600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:48,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:19:48,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880407010] [2021-06-05 18:19:48,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:48,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:48,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:48,574 INFO L87 Difference]: Start difference. First operand 3878 states and 10883 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:49,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:49,382 INFO L93 Difference]: Finished difference Result 5279 states and 14163 transitions. [2021-06-05 18:19:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:19:49,382 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:49,386 INFO L225 Difference]: With dead ends: 5279 [2021-06-05 18:19:49,386 INFO L226 Difference]: Without dead ends: 4656 [2021-06-05 18:19:49,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 750.0ms TimeCoverageRelationStatistics Valid=1037, Invalid=2995, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:19:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4656 states. [2021-06-05 18:19:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4656 to 3788. [2021-06-05 18:19:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 2.81172432004225) internal successors, (10648), 3787 states have internal predecessors, (10648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 10648 transitions. [2021-06-05 18:19:49,423 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 10648 transitions. Word has length 120 [2021-06-05 18:19:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:49,423 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 10648 transitions. [2021-06-05 18:19:49,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 10648 transitions. [2021-06-05 18:19:49,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:49,426 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:49,426 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:49,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:49,626 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 165 times [2021-06-05 18:19:49,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:49,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296522980] [2021-06-05 18:19:49,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296522980] [2021-06-05 18:19:49,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296522980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119265098] [2021-06-05 18:19:49,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:49,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:49,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:49,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:49,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119265098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:49,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-06-05 18:19:49,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579535206] [2021-06-05 18:19:49,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:49,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:49,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:49,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:49,965 INFO L87 Difference]: Start difference. First operand 3788 states and 10648 transitions. Second operand has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:50,572 INFO L93 Difference]: Finished difference Result 5508 states and 14881 transitions. [2021-06-05 18:19:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:50,572 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:50,577 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 18:19:50,577 INFO L226 Difference]: Without dead ends: 5238 [2021-06-05 18:19:50,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 571.0ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:19:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5238 states. [2021-06-05 18:19:50,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5238 to 3968. [2021-06-05 18:19:50,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 2.825056717922864) internal successors, (11207), 3967 states have internal predecessors, (11207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 11207 transitions. [2021-06-05 18:19:50,615 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 11207 transitions. Word has length 120 [2021-06-05 18:19:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:50,615 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 11207 transitions. [2021-06-05 18:19:50,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.217391304347826) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 11207 transitions. [2021-06-05 18:19:50,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:50,618 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:50,618 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:50,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:50,818 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 166 times [2021-06-05 18:19:50,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:50,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818231129] [2021-06-05 18:19:50,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:50,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818231129] [2021-06-05 18:19:50,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818231129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:50,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173143411] [2021-06-05 18:19:50,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:51,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:51,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:51,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:51,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:51,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173143411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:51,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:19:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513686580] [2021-06-05 18:19:51,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:19:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:19:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:51,167 INFO L87 Difference]: Start difference. First operand 3968 states and 11207 transitions. Second operand has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:52,022 INFO L93 Difference]: Finished difference Result 5451 states and 14741 transitions. [2021-06-05 18:19:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 18:19:52,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-06-05 18:19:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:52,027 INFO L225 Difference]: With dead ends: 5451 [2021-06-05 18:19:52,027 INFO L226 Difference]: Without dead ends: 4876 [2021-06-05 18:19:52,027 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=1212, Invalid=3344, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 18:19:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-05 18:19:52,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-05 18:19:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:52,065 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 120 [2021-06-05 18:19:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:52,065 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:52,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.92) internal successors, (123), 25 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:52,065 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:52,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:52,068 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:52,068 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:52,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:52,269 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 167 times [2021-06-05 18:19:52,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:52,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000520631] [2021-06-05 18:19:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:52,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000520631] [2021-06-05 18:19:52,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000520631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713649692] [2021-06-05 18:19:52,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:52,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:52,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:52,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:52,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713649692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:52,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:19:52,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214357665] [2021-06-05 18:19:52,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:52,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:52,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:52,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:52,675 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:53,037 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-05 18:19:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:53,042 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 18:19:53,042 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 18:19:53,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 18:19:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-05 18:19:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:53,079 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:53,079 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:53,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:53,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:53,083 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:53,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-05 18:19:53,283 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:53,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 168 times [2021-06-05 18:19:53,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:53,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537612637] [2021-06-05 18:19:53,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:53,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537612637] [2021-06-05 18:19:53,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537612637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352538839] [2021-06-05 18:19:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:53,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:19:53,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:53,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:53,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352538839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:53,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:19:53,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228093976] [2021-06-05 18:19:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:19:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:19:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:53,738 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:54,144 INFO L93 Difference]: Finished difference Result 5641 states and 14687 transitions. [2021-06-05 18:19:54,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:54,150 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 18:19:54,150 INFO L226 Difference]: Without dead ends: 5371 [2021-06-05 18:19:54,151 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 486.5ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5371 states. [2021-06-05 18:19:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5371 to 4003. [2021-06-05 18:19:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:54,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:54,193 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:54,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:54,194 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:54,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:54,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:54,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:54,197 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:54,197 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:54,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,397 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:54,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:54,397 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 169 times [2021-06-05 18:19:54,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:54,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481882620] [2021-06-05 18:19:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,587 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:54,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481882620] [2021-06-05 18:19:54,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481882620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737549955] [2021-06-05 18:19:54,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:54,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737549955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:54,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:19:54,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511045481] [2021-06-05 18:19:54,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:54,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:54,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:54,788 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:55,212 INFO L93 Difference]: Finished difference Result 5596 states and 14597 transitions. [2021-06-05 18:19:55,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:55,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:55,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:55,217 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 18:19:55,217 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 18:19:55,217 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 18:19:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4003. [2021-06-05 18:19:55,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:55,256 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:55,256 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:55,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:55,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:55,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:55,259 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:55,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 18:19:55,459 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:55,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:55,459 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 170 times [2021-06-05 18:19:55,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:55,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060041497] [2021-06-05 18:19:55,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060041497] [2021-06-05 18:19:55,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060041497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762631454] [2021-06-05 18:19:55,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:55,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:55,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:55,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:55,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762631454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:55,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:19:55,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555045374] [2021-06-05 18:19:55,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:19:55,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:55,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:19:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:55,865 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:56,342 INFO L93 Difference]: Finished difference Result 5546 states and 14497 transitions. [2021-06-05 18:19:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:56,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:56,348 INFO L225 Difference]: With dead ends: 5546 [2021-06-05 18:19:56,348 INFO L226 Difference]: Without dead ends: 5276 [2021-06-05 18:19:56,348 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 551 ImplicationChecksByTransitivity, 520.7ms TimeCoverageRelationStatistics Valid=653, Invalid=2103, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5276 states. [2021-06-05 18:19:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5276 to 4003. [2021-06-05 18:19:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:56,390 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:56,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:56,390 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:56,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:56,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:56,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:56,393 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:56,393 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:56,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 18:19:56,609 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 171 times [2021-06-05 18:19:56,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:56,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058045489] [2021-06-05 18:19:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:56,810 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:56,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:56,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058045489] [2021-06-05 18:19:56,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058045489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:56,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235104063] [2021-06-05 18:19:56,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:56,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:19:56,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:56,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:56,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235104063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:57,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:19:57,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57084398] [2021-06-05 18:19:57,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:57,019 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:57,515 INFO L93 Difference]: Finished difference Result 5496 states and 14397 transitions. [2021-06-05 18:19:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:57,521 INFO L225 Difference]: With dead ends: 5496 [2021-06-05 18:19:57,521 INFO L226 Difference]: Without dead ends: 5226 [2021-06-05 18:19:57,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5226 states. [2021-06-05 18:19:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5226 to 4003. [2021-06-05 18:19:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:57,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:57,568 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:57,568 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:57,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:57,571 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:57,571 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:57,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 18:19:57,772 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 172 times [2021-06-05 18:19:57,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:57,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452842702] [2021-06-05 18:19:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:57,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452842702] [2021-06-05 18:19:57,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452842702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865853051] [2021-06-05 18:19:57,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:58,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:58,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:58,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:58,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:58,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865853051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:58,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:19:58,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218371008] [2021-06-05 18:19:58,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:19:58,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:58,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:19:58,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:58,170 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:58,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:58,724 INFO L93 Difference]: Finished difference Result 5446 states and 14297 transitions. [2021-06-05 18:19:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:58,725 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:58,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:58,730 INFO L225 Difference]: With dead ends: 5446 [2021-06-05 18:19:58,730 INFO L226 Difference]: Without dead ends: 5176 [2021-06-05 18:19:58,731 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 562.9ms TimeCoverageRelationStatistics Valid=691, Invalid=2279, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5176 states. [2021-06-05 18:19:58,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5176 to 4003. [2021-06-05 18:19:58,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:58,774 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:58,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:58,778 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:58,778 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:19:58,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-06-05 18:19:58,993 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 173 times [2021-06-05 18:19:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:58,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660640357] [2021-06-05 18:19:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:59,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:59,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660640357] [2021-06-05 18:19:59,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660640357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:59,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219235108] [2021-06-05 18:19:59,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:59,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:19:59,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:59,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:59,373 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:59,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219235108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:59,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:59,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:19:59,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372118981] [2021-06-05 18:19:59,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:59,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:59,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:59,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:59,374 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:59,850 INFO L93 Difference]: Finished difference Result 5396 states and 14197 transitions. [2021-06-05 18:19:59,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:59,851 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:19:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:59,856 INFO L225 Difference]: With dead ends: 5396 [2021-06-05 18:19:59,856 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 18:19:59,856 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=719, Invalid=2251, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 18:19:59,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 4003. [2021-06-05 18:19:59,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:19:59,901 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:19:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:59,901 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:19:59,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:19:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:19:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:19:59,904 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:59,904 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:00,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:00,104 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:00,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 174 times [2021-06-05 18:20:00,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:00,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507487216] [2021-06-05 18:20:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:00,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507487216] [2021-06-05 18:20:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507487216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:00,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114607627] [2021-06-05 18:20:00,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:00,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:00,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:00,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:00,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114607627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:00,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:00,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:00,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934315501] [2021-06-05 18:20:00,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:00,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:00,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:00,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:00,554 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:01,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:01,151 INFO L93 Difference]: Finished difference Result 5346 states and 14097 transitions. [2021-06-05 18:20:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:20:01,152 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:01,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:01,156 INFO L225 Difference]: With dead ends: 5346 [2021-06-05 18:20:01,156 INFO L226 Difference]: Without dead ends: 5076 [2021-06-05 18:20:01,156 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=745, Invalid=2447, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:20:01,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5076 states. [2021-06-05 18:20:01,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5076 to 4003. [2021-06-05 18:20:01,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:01,193 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:01,193 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:01,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:01,196 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:01,196 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:01,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 18:20:01,397 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 175 times [2021-06-05 18:20:01,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:01,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402531597] [2021-06-05 18:20:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:01,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402531597] [2021-06-05 18:20:01,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402531597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002084428] [2021-06-05 18:20:01,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:01,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002084428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:01,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:20:01,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496453715] [2021-06-05 18:20:01,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:01,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:01,787 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:02,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:02,376 INFO L93 Difference]: Finished difference Result 5296 states and 13997 transitions. [2021-06-05 18:20:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:20:02,376 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:02,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:02,381 INFO L225 Difference]: With dead ends: 5296 [2021-06-05 18:20:02,382 INFO L226 Difference]: Without dead ends: 5026 [2021-06-05 18:20:02,382 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:20:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2021-06-05 18:20:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 4003. [2021-06-05 18:20:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:02,425 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:02,425 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:02,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:02,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:02,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:02,429 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:02,429 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:02,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:02,641 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 176 times [2021-06-05 18:20:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012164659] [2021-06-05 18:20:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:02,822 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:02,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012164659] [2021-06-05 18:20:02,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012164659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904464715] [2021-06-05 18:20:02,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:02,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:03,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904464715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:03,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:03,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:03,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317341081] [2021-06-05 18:20:03,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:03,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:03,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:03,028 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:03,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:03,738 INFO L93 Difference]: Finished difference Result 5246 states and 13897 transitions. [2021-06-05 18:20:03,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:20:03,738 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:03,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:03,744 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 18:20:03,744 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 18:20:03,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 675.1ms TimeCoverageRelationStatistics Valid=815, Invalid=2607, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 18:20:03,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 4003. [2021-06-05 18:20:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:03,789 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:03,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:03,789 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:03,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:03,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:03,792 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:03,792 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:03,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:03,993 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 177 times [2021-06-05 18:20:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:03,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925776873] [2021-06-05 18:20:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:04,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925776873] [2021-06-05 18:20:04,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925776873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966433275] [2021-06-05 18:20:04,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:04,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:04,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:04,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:04,434 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966433275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:04,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:20:04,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748628944] [2021-06-05 18:20:04,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:04,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:04,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:04,435 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:05,027 INFO L93 Difference]: Finished difference Result 5196 states and 13797 transitions. [2021-06-05 18:20:05,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:20:05,027 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:05,032 INFO L225 Difference]: With dead ends: 5196 [2021-06-05 18:20:05,032 INFO L226 Difference]: Without dead ends: 4926 [2021-06-05 18:20:05,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 580.0ms TimeCoverageRelationStatistics Valid=871, Invalid=2551, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:05,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-06-05 18:20:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4003. [2021-06-05 18:20:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:05,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:05,071 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:05,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:05,071 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:05,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:05,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:05,074 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:05,074 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:05,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:05,274 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:05,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:05,275 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 178 times [2021-06-05 18:20:05,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:05,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128795053] [2021-06-05 18:20:05,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:05,505 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:05,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128795053] [2021-06-05 18:20:05,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128795053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472998718] [2021-06-05 18:20:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:05,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:05,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:05,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:05,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:05,756 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:05,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472998718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:05,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:05,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38823385] [2021-06-05 18:20:05,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:05,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:05,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:05,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:05,757 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:06,462 INFO L93 Difference]: Finished difference Result 5146 states and 13697 transitions. [2021-06-05 18:20:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:20:06,462 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:06,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:06,467 INFO L225 Difference]: With dead ends: 5146 [2021-06-05 18:20:06,467 INFO L226 Difference]: Without dead ends: 4876 [2021-06-05 18:20:06,468 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 718.0ms TimeCoverageRelationStatistics Valid=901, Invalid=2759, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:20:06,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2021-06-05 18:20:06,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4003. [2021-06-05 18:20:06,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:06,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:06,507 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:06,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:06,507 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:06,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:06,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:06,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:06,510 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:06,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:06,710 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:06,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:06,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 179 times [2021-06-05 18:20:06,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:06,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944624903] [2021-06-05 18:20:06,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:06,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944624903] [2021-06-05 18:20:06,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944624903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349828176] [2021-06-05 18:20:06,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:06,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:06,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:06,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:07,094 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:07,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349828176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:07,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:20:07,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18210529] [2021-06-05 18:20:07,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:07,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:07,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:07,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:07,095 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:07,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:07,768 INFO L93 Difference]: Finished difference Result 5096 states and 13597 transitions. [2021-06-05 18:20:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:20:07,769 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:07,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:07,773 INFO L225 Difference]: With dead ends: 5096 [2021-06-05 18:20:07,773 INFO L226 Difference]: Without dead ends: 4826 [2021-06-05 18:20:07,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 660.5ms TimeCoverageRelationStatistics Valid=971, Invalid=2689, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:20:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-06-05 18:20:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4003. [2021-06-05 18:20:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:07,811 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:07,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:07,812 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:07,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:07,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:07,815 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:07,815 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:08,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-06-05 18:20:08,015 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:08,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 180 times [2021-06-05 18:20:08,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:08,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226988947] [2021-06-05 18:20:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226988947] [2021-06-05 18:20:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226988947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864059098] [2021-06-05 18:20:08,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:08,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:08,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:08,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:08,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864059098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:08,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447734393] [2021-06-05 18:20:08,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:08,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:08,425 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:09,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:09,201 INFO L93 Difference]: Finished difference Result 5046 states and 13497 transitions. [2021-06-05 18:20:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:20:09,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:09,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:09,206 INFO L225 Difference]: With dead ends: 5046 [2021-06-05 18:20:09,206 INFO L226 Difference]: Without dead ends: 4776 [2021-06-05 18:20:09,206 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=1003, Invalid=2903, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:20:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4776 states. [2021-06-05 18:20:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4776 to 4003. [2021-06-05 18:20:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:09,243 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:09,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:09,243 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:09,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:09,243 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:09,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:09,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:09,246 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:09,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 18:20:09,447 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:09,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:09,447 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 181 times [2021-06-05 18:20:09,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:09,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325655515] [2021-06-05 18:20:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:09,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325655515] [2021-06-05 18:20:09,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325655515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775606725] [2021-06-05 18:20:09,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:09,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775606725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:09,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:20:09,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337630008] [2021-06-05 18:20:09,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:09,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:09,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:09,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:09,859 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:10,519 INFO L93 Difference]: Finished difference Result 4996 states and 13397 transitions. [2021-06-05 18:20:10,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:20:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:10,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:10,524 INFO L225 Difference]: With dead ends: 4996 [2021-06-05 18:20:10,524 INFO L226 Difference]: Without dead ends: 4726 [2021-06-05 18:20:10,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 18:20:10,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4726 states. [2021-06-05 18:20:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4726 to 4003. [2021-06-05 18:20:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8193403298350823) internal successors, (11283), 4002 states have internal predecessors, (11283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:10,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11283 transitions. [2021-06-05 18:20:10,565 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11283 transitions. Word has length 125 [2021-06-05 18:20:10,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:10,565 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11283 transitions. [2021-06-05 18:20:10,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:10,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11283 transitions. [2021-06-05 18:20:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:10,568 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:10,568 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:10,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 18:20:10,768 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 182 times [2021-06-05 18:20:10,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:10,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335831975] [2021-06-05 18:20:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:10,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:10,949 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:10,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:10,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335831975] [2021-06-05 18:20:10,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335831975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635121296] [2021-06-05 18:20:10,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:11,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:11,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:11,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:11,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635121296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:11,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:11,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:11,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804333848] [2021-06-05 18:20:11,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:11,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:11,155 INFO L87 Difference]: Start difference. First operand 4003 states and 11283 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:11,974 INFO L93 Difference]: Finished difference Result 5006 states and 13447 transitions. [2021-06-05 18:20:11,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:20:11,974 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:11,979 INFO L225 Difference]: With dead ends: 5006 [2021-06-05 18:20:11,979 INFO L226 Difference]: Without dead ends: 4736 [2021-06-05 18:20:11,980 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 789.0ms TimeCoverageRelationStatistics Valid=1121, Invalid=3039, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:20:11,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2021-06-05 18:20:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4003. [2021-06-05 18:20:12,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4003 states, 4002 states have (on average 2.8205897051474262) internal successors, (11288), 4002 states have internal predecessors, (11288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4003 states to 4003 states and 11288 transitions. [2021-06-05 18:20:12,032 INFO L78 Accepts]: Start accepts. Automaton has 4003 states and 11288 transitions. Word has length 125 [2021-06-05 18:20:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:12,032 INFO L482 AbstractCegarLoop]: Abstraction has 4003 states and 11288 transitions. [2021-06-05 18:20:12,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4003 states and 11288 transitions. [2021-06-05 18:20:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:12,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:12,035 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:12,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:12,237 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 183 times [2021-06-05 18:20:12,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:12,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977813097] [2021-06-05 18:20:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:12,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977813097] [2021-06-05 18:20:12,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977813097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12604626] [2021-06-05 18:20:12,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:12,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:12,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:12,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12604626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:12,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-06-05 18:20:12,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795234473] [2021-06-05 18:20:12,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:12,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:12,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:12,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:12,616 INFO L87 Difference]: Start difference. First operand 4003 states and 11288 transitions. Second operand has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:13,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:13,308 INFO L93 Difference]: Finished difference Result 5748 states and 15571 transitions. [2021-06-05 18:20:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:20:13,308 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:13,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:13,314 INFO L225 Difference]: With dead ends: 5748 [2021-06-05 18:20:13,314 INFO L226 Difference]: Without dead ends: 5478 [2021-06-05 18:20:13,315 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1166 ImplicationChecksByTransitivity, 654.3ms TimeCoverageRelationStatistics Valid=1220, Invalid=2940, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:20:13,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-06-05 18:20:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 4183. [2021-06-05 18:20:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4183 states, 4182 states have (on average 2.832855093256815) internal successors, (11847), 4182 states have internal predecessors, (11847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4183 states to 4183 states and 11847 transitions. [2021-06-05 18:20:13,363 INFO L78 Accepts]: Start accepts. Automaton has 4183 states and 11847 transitions. Word has length 125 [2021-06-05 18:20:13,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:13,363 INFO L482 AbstractCegarLoop]: Abstraction has 4183 states and 11847 transitions. [2021-06-05 18:20:13,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.208333333333333) internal successors, (125), 24 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 4183 states and 11847 transitions. [2021-06-05 18:20:13,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:13,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:13,367 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:13,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:13,569 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:13,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 184 times [2021-06-05 18:20:13,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:13,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094241081] [2021-06-05 18:20:13,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:13,773 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:13,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094241081] [2021-06-05 18:20:13,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094241081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:13,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257931472] [2021-06-05 18:20:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:13,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:13,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:13,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:13,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:14,000 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257931472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:14,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:14,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568898198] [2021-06-05 18:20:14,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:14,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:14,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:14,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:14,001 INFO L87 Difference]: Start difference. First operand 4183 states and 11847 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:14,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:14,883 INFO L93 Difference]: Finished difference Result 5210 states and 14221 transitions. [2021-06-05 18:20:14,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:20:14,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-06-05 18:20:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:14,888 INFO L225 Difference]: With dead ends: 5210 [2021-06-05 18:20:14,888 INFO L226 Difference]: Without dead ends: 4721 [2021-06-05 18:20:14,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 881.3ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:20:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-05 18:20:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 4128. [2021-06-05 18:20:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4128 states, 4127 states have (on average 2.8308698812696873) internal successors, (11683), 4127 states have internal predecessors, (11683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4128 states to 4128 states and 11683 transitions. [2021-06-05 18:20:14,925 INFO L78 Accepts]: Start accepts. Automaton has 4128 states and 11683 transitions. Word has length 125 [2021-06-05 18:20:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:14,925 INFO L482 AbstractCegarLoop]: Abstraction has 4128 states and 11683 transitions. [2021-06-05 18:20:14,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:14,926 INFO L276 IsEmpty]: Start isEmpty. Operand 4128 states and 11683 transitions. [2021-06-05 18:20:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:14,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:14,929 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:15,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:15,129 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:15,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:15,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 185 times [2021-06-05 18:20:15,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:15,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205771930] [2021-06-05 18:20:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:15,353 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:15,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:15,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205771930] [2021-06-05 18:20:15,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205771930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:15,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100256572] [2021-06-05 18:20:15,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:15,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:20:15,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:15,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:20:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:15,608 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:15,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100256572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:15,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:15,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 28 [2021-06-05 18:20:15,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396442954] [2021-06-05 18:20:15,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 18:20:15,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:15,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 18:20:15,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:20:15,609 INFO L87 Difference]: Start difference. First operand 4128 states and 11683 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:16,054 INFO L93 Difference]: Finished difference Result 4948 states and 13451 transitions. [2021-06-05 18:20:16,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:16,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:16,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:16,059 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 18:20:16,059 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 18:20:16,060 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 520.9ms TimeCoverageRelationStatistics Valid=725, Invalid=1927, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 18:20:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 4213. [2021-06-05 18:20:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4213 states, 4212 states have (on average 2.8141025641025643) internal successors, (11853), 4212 states have internal predecessors, (11853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:16,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4213 states to 4213 states and 11853 transitions. [2021-06-05 18:20:16,101 INFO L78 Accepts]: Start accepts. Automaton has 4213 states and 11853 transitions. Word has length 130 [2021-06-05 18:20:16,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:16,101 INFO L482 AbstractCegarLoop]: Abstraction has 4213 states and 11853 transitions. [2021-06-05 18:20:16,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:16,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4213 states and 11853 transitions. [2021-06-05 18:20:16,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:16,105 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:16,105 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:16,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:16,305 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:16,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2037815609, now seen corresponding path program 186 times [2021-06-05 18:20:16,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:16,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265241389] [2021-06-05 18:20:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:16,524 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:16,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265241389] [2021-06-05 18:20:16,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265241389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103012061] [2021-06-05 18:20:16,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:16,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:20:16,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:16,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103012061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:16,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:16,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116679062] [2021-06-05 18:20:16,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:16,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:16,762 INFO L87 Difference]: Start difference. First operand 4213 states and 11853 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:17,171 INFO L93 Difference]: Finished difference Result 6061 states and 15677 transitions. [2021-06-05 18:20:17,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:20:17,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:17,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:17,176 INFO L225 Difference]: With dead ends: 6061 [2021-06-05 18:20:17,176 INFO L226 Difference]: Without dead ends: 5791 [2021-06-05 18:20:17,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=616, Invalid=1640, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:20:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-06-05 18:20:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 4228. [2021-06-05 18:20:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:17,218 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:17,219 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:17,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:17,219 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:17,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:17,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:17,222 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:17,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 18:20:17,423 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:17,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:17,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1614777271, now seen corresponding path program 187 times [2021-06-05 18:20:17,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:17,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609099671] [2021-06-05 18:20:17,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609099671] [2021-06-05 18:20:17,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609099671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392025700] [2021-06-05 18:20:17,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:17,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:17,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:17,874 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392025700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:17,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:17,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857850365] [2021-06-05 18:20:17,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:17,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:17,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:17,875 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:18,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:18,327 INFO L93 Difference]: Finished difference Result 5946 states and 15447 transitions. [2021-06-05 18:20:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:18,333 INFO L225 Difference]: With dead ends: 5946 [2021-06-05 18:20:18,333 INFO L226 Difference]: Without dead ends: 5676 [2021-06-05 18:20:18,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 529.2ms TimeCoverageRelationStatistics Valid=683, Invalid=1969, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:18,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5676 states. [2021-06-05 18:20:18,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5676 to 4228. [2021-06-05 18:20:18,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:18,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:18,375 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:18,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:18,375 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:18,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:18,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:18,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:18,379 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:18,379 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:18,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:18,595 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:18,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:18,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1568230341, now seen corresponding path program 188 times [2021-06-05 18:20:18,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:18,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748514908] [2021-06-05 18:20:18,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:18,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748514908] [2021-06-05 18:20:18,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748514908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548249387] [2021-06-05 18:20:18,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:18,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:18,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:18,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:18,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:19,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548249387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:19,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:19,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:19,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174714023] [2021-06-05 18:20:19,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:19,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:19,064 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:19,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,540 INFO L93 Difference]: Finished difference Result 5921 states and 15397 transitions. [2021-06-05 18:20:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:19,541 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:19,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:19,546 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 18:20:19,546 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 18:20:19,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 535.5ms TimeCoverageRelationStatistics Valid=621, Invalid=1829, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:20:19,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 18:20:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 4228. [2021-06-05 18:20:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:19,593 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:19,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:19,593 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:19,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:19,593 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:19,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:19,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:19,597 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:19,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:19,797 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash 649845941, now seen corresponding path program 189 times [2021-06-05 18:20:19,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:19,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151587829] [2021-06-05 18:20:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:20,022 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:20,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151587829] [2021-06-05 18:20:20,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151587829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132429480] [2021-06-05 18:20:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:20,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:20,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:20,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132429480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:20,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:20,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277425397] [2021-06-05 18:20:20,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:20,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:20,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:20,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:20,261 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:20,753 INFO L93 Difference]: Finished difference Result 5871 states and 15297 transitions. [2021-06-05 18:20:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:20,758 INFO L225 Difference]: With dead ends: 5871 [2021-06-05 18:20:20,759 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 18:20:20,759 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=696, Invalid=2166, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 18:20:20,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4228. [2021-06-05 18:20:20,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:20,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:20,803 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:20,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:20,803 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:20,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:20,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:20,807 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:21,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:21,007 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:21,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1126844861, now seen corresponding path program 190 times [2021-06-05 18:20:21,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:21,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003209792] [2021-06-05 18:20:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:21,208 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:21,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003209792] [2021-06-05 18:20:21,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003209792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796665160] [2021-06-05 18:20:21,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:21,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796665160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:21,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:21,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073663643] [2021-06-05 18:20:21,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:21,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:21,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:21,422 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:21,908 INFO L93 Difference]: Finished difference Result 5821 states and 15197 transitions. [2021-06-05 18:20:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:21,913 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 18:20:21,913 INFO L226 Difference]: Without dead ends: 5551 [2021-06-05 18:20:21,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 516.5ms TimeCoverageRelationStatistics Valid=642, Invalid=2010, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5551 states. [2021-06-05 18:20:21,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5551 to 4228. [2021-06-05 18:20:21,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:21,953 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:21,953 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:21,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:21,957 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:21,957 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:22,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:22,173 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:22,173 INFO L82 PathProgramCache]: Analyzing trace with hash 972796723, now seen corresponding path program 191 times [2021-06-05 18:20:22,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:22,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658604431] [2021-06-05 18:20:22,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:22,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658604431] [2021-06-05 18:20:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658604431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:22,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518390034] [2021-06-05 18:20:22,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:22,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:20:22,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:22,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:22,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518390034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:22,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:22,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:22,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558558027] [2021-06-05 18:20:22,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:22,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:22,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:22,602 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:23,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:23,139 INFO L93 Difference]: Finished difference Result 5771 states and 15097 transitions. [2021-06-05 18:20:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:20:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:23,145 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 18:20:23,145 INFO L226 Difference]: Without dead ends: 5501 [2021-06-05 18:20:23,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 588.5ms TimeCoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:20:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5501 states. [2021-06-05 18:20:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5501 to 4228. [2021-06-05 18:20:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:23,187 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:23,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:23,187 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:23,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:23,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:23,190 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:23,190 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:23,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 18:20:23,391 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1811970495, now seen corresponding path program 192 times [2021-06-05 18:20:23,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:23,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014016209] [2021-06-05 18:20:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:23,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014016209] [2021-06-05 18:20:23,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014016209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744289335] [2021-06-05 18:20:23,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:23,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:20:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:23,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:23,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744289335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:23,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336914779] [2021-06-05 18:20:23,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:23,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:23,801 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:24,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:24,351 INFO L93 Difference]: Finished difference Result 5721 states and 14997 transitions. [2021-06-05 18:20:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:24,356 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 18:20:24,356 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 18:20:24,357 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 526.3ms TimeCoverageRelationStatistics Valid=679, Invalid=2183, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:24,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 18:20:24,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4228. [2021-06-05 18:20:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:24,396 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:24,396 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:24,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:24,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:24,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:24,399 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:24,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 18:20:24,600 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:24,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:24,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1172312271, now seen corresponding path program 193 times [2021-06-05 18:20:24,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:24,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730940307] [2021-06-05 18:20:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:24,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:24,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730940307] [2021-06-05 18:20:24,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730940307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486327603] [2021-06-05 18:20:24,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:24,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:25,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486327603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:25,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:25,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211949334] [2021-06-05 18:20:25,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:25,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:25,020 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:25,689 INFO L93 Difference]: Finished difference Result 5671 states and 14897 transitions. [2021-06-05 18:20:25,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:20:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:25,695 INFO L225 Difference]: With dead ends: 5671 [2021-06-05 18:20:25,695 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 18:20:25,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 643.5ms TimeCoverageRelationStatistics Valid=770, Invalid=2536, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:20:25,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 18:20:25,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4228. [2021-06-05 18:20:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:25,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:25,737 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:25,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:25,737 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:25,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:25,737 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:25,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:25,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:25,740 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:25,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-05 18:20:25,941 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1947231297, now seen corresponding path program 194 times [2021-06-05 18:20:25,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:25,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71772453] [2021-06-05 18:20:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:26,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71772453] [2021-06-05 18:20:26,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71772453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185374411] [2021-06-05 18:20:26,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:26,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:26,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:26,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:26,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185374411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:26,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672492384] [2021-06-05 18:20:26,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:26,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:26,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:26,343 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:26,954 INFO L93 Difference]: Finished difference Result 5621 states and 14797 transitions. [2021-06-05 18:20:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:20:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:26,960 INFO L225 Difference]: With dead ends: 5621 [2021-06-05 18:20:26,960 INFO L226 Difference]: Without dead ends: 5351 [2021-06-05 18:20:26,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=732, Invalid=2348, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:20:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2021-06-05 18:20:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 4228. [2021-06-05 18:20:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:27,001 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:27,002 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:27,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:27,002 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:27,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:27,005 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:27,005 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:27,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 18:20:27,205 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1893822639, now seen corresponding path program 195 times [2021-06-05 18:20:27,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:27,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234868043] [2021-06-05 18:20:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:27,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:27,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234868043] [2021-06-05 18:20:27,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234868043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:27,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971880187] [2021-06-05 18:20:27,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:27,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971880187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:27,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:27,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:27,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238341950] [2021-06-05 18:20:27,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:27,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:27,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:27,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:27,632 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:28,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:28,347 INFO L93 Difference]: Finished difference Result 5571 states and 14697 transitions. [2021-06-05 18:20:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:20:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:28,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:28,353 INFO L225 Difference]: With dead ends: 5571 [2021-06-05 18:20:28,353 INFO L226 Difference]: Without dead ends: 5301 [2021-06-05 18:20:28,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=831, Invalid=2709, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:20:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5301 states. [2021-06-05 18:20:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5301 to 4228. [2021-06-05 18:20:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:28,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:28,396 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:28,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:28,396 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:28,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:28,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:28,399 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:28,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:28,600 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1523132739, now seen corresponding path program 196 times [2021-06-05 18:20:28,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:28,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746167635] [2021-06-05 18:20:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:28,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746167635] [2021-06-05 18:20:28,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746167635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:28,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297453977] [2021-06-05 18:20:28,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:28,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:28,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:28,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:28,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:29,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297453977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:29,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:29,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861328515] [2021-06-05 18:20:29,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:29,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:29,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:29,045 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:29,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:29,700 INFO L93 Difference]: Finished difference Result 5521 states and 14597 transitions. [2021-06-05 18:20:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:20:29,701 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:29,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:29,706 INFO L225 Difference]: With dead ends: 5521 [2021-06-05 18:20:29,706 INFO L226 Difference]: Without dead ends: 5251 [2021-06-05 18:20:29,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 617.3ms TimeCoverageRelationStatistics Valid=801, Invalid=2505, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:20:29,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5251 states. [2021-06-05 18:20:29,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5251 to 4228. [2021-06-05 18:20:29,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:29,750 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:29,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:29,750 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:29,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:29,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:29,754 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:29,754 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:29,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 18:20:29,961 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:29,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:29,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1871779757, now seen corresponding path program 197 times [2021-06-05 18:20:29,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:29,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791720990] [2021-06-05 18:20:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:30,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:30,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791720990] [2021-06-05 18:20:30,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791720990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168493870] [2021-06-05 18:20:30,160 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:30,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:20:30,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:30,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:30,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:30,373 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:30,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168493870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:30,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:30,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635894527] [2021-06-05 18:20:30,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:30,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:30,374 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:31,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:31,119 INFO L93 Difference]: Finished difference Result 5471 states and 14497 transitions. [2021-06-05 18:20:31,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:20:31,120 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:31,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:31,125 INFO L225 Difference]: With dead ends: 5471 [2021-06-05 18:20:31,125 INFO L226 Difference]: Without dead ends: 5201 [2021-06-05 18:20:31,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=908, Invalid=2874, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:20:31,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5201 states. [2021-06-05 18:20:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5201 to 4228. [2021-06-05 18:20:31,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:31,165 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:31,165 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:31,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:31,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:31,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:31,168 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:31,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,369 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1442715451, now seen corresponding path program 198 times [2021-06-05 18:20:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:31,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957126191] [2021-06-05 18:20:31,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:31,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957126191] [2021-06-05 18:20:31,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957126191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054935587] [2021-06-05 18:20:31,568 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:20:31,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:31,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:31,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054935587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:31,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:31,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102367542] [2021-06-05 18:20:31,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:31,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:31,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:31,776 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:32,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:32,429 INFO L93 Difference]: Finished difference Result 5421 states and 14397 transitions. [2021-06-05 18:20:32,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:20:32,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:32,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:32,435 INFO L225 Difference]: With dead ends: 5421 [2021-06-05 18:20:32,435 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 18:20:32,435 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 609.3ms TimeCoverageRelationStatistics Valid=886, Invalid=2654, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:20:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 18:20:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4228. [2021-06-05 18:20:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:32,476 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:32,476 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:32,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:32,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:32,479 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:32,479 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:32,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 18:20:32,680 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:32,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:32,680 INFO L82 PathProgramCache]: Analyzing trace with hash 756532267, now seen corresponding path program 199 times [2021-06-05 18:20:32,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:32,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578012199] [2021-06-05 18:20:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:32,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:32,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578012199] [2021-06-05 18:20:32,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578012199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300820801] [2021-06-05 18:20:32,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:33,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300820801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:33,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:33,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:33,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204653207] [2021-06-05 18:20:33,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:33,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:33,093 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,920 INFO L93 Difference]: Finished difference Result 5371 states and 14297 transitions. [2021-06-05 18:20:33,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:20:33,920 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:33,925 INFO L225 Difference]: With dead ends: 5371 [2021-06-05 18:20:33,925 INFO L226 Difference]: Without dead ends: 5101 [2021-06-05 18:20:33,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 773.6ms TimeCoverageRelationStatistics Valid=1001, Invalid=3031, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:20:33,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5101 states. [2021-06-05 18:20:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5101 to 4228. [2021-06-05 18:20:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:33,961 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:33,961 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:33,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:33,962 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:33,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:33,965 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:34,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:34,165 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 671497529, now seen corresponding path program 200 times [2021-06-05 18:20:34,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:34,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937830007] [2021-06-05 18:20:34,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937830007] [2021-06-05 18:20:34,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937830007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970301629] [2021-06-05 18:20:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:34,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:34,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:34,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970301629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:34,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:34,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836274298] [2021-06-05 18:20:34,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:34,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:34,560 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:35,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:35,235 INFO L93 Difference]: Finished difference Result 5321 states and 14197 transitions. [2021-06-05 18:20:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:20:35,235 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:35,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:35,240 INFO L225 Difference]: With dead ends: 5321 [2021-06-05 18:20:35,240 INFO L226 Difference]: Without dead ends: 5051 [2021-06-05 18:20:35,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 922 ImplicationChecksByTransitivity, 632.1ms TimeCoverageRelationStatistics Valid=987, Invalid=2795, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:20:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-06-05 18:20:35,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 4228. [2021-06-05 18:20:35,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:35,280 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:35,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:35,280 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:35,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:35,280 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:35,283 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:35,283 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:35,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:35,484 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 603346473, now seen corresponding path program 201 times [2021-06-05 18:20:35,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:35,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066407201] [2021-06-05 18:20:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:35,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:35,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066407201] [2021-06-05 18:20:35,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066407201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732412073] [2021-06-05 18:20:35,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:35,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:35,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:35,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:35,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732412073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:35,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:35,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832539184] [2021-06-05 18:20:35,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:35,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:35,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:35,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:35,906 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:36,739 INFO L93 Difference]: Finished difference Result 5271 states and 14097 transitions. [2021-06-05 18:20:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:20:36,739 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:36,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:36,744 INFO L225 Difference]: With dead ends: 5271 [2021-06-05 18:20:36,744 INFO L226 Difference]: Without dead ends: 5001 [2021-06-05 18:20:36,744 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=1110, Invalid=3180, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:20:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5001 states. [2021-06-05 18:20:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5001 to 4228. [2021-06-05 18:20:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:36,784 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:36,784 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:36,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:36,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:36,787 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:36,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:36,988 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash -693622601, now seen corresponding path program 202 times [2021-06-05 18:20:36,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:36,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903398994] [2021-06-05 18:20:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:37,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:37,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903398994] [2021-06-05 18:20:37,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903398994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037573769] [2021-06-05 18:20:37,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:37,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:37,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:37,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:37,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:37,370 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:37,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037573769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:37,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:37,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372216718] [2021-06-05 18:20:37,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:37,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:37,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:37,371 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:38,095 INFO L93 Difference]: Finished difference Result 5221 states and 13997 transitions. [2021-06-05 18:20:38,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:20:38,095 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:38,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:38,101 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 18:20:38,101 INFO L226 Difference]: Without dead ends: 4951 [2021-06-05 18:20:38,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 682.4ms TimeCoverageRelationStatistics Valid=1104, Invalid=2928, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:20:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4951 states. [2021-06-05 18:20:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4951 to 4228. [2021-06-05 18:20:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4228 states, 4227 states have (on average 2.8112136266855927) internal successors, (11883), 4227 states have internal predecessors, (11883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4228 states to 4228 states and 11883 transitions. [2021-06-05 18:20:38,149 INFO L78 Accepts]: Start accepts. Automaton has 4228 states and 11883 transitions. Word has length 130 [2021-06-05 18:20:38,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:38,149 INFO L482 AbstractCegarLoop]: Abstraction has 4228 states and 11883 transitions. [2021-06-05 18:20:38,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:38,150 INFO L276 IsEmpty]: Start isEmpty. Operand 4228 states and 11883 transitions. [2021-06-05 18:20:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:38,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:38,153 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:38,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 18:20:38,373 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:38,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:38,373 INFO L82 PathProgramCache]: Analyzing trace with hash -263869017, now seen corresponding path program 203 times [2021-06-05 18:20:38,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:38,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740333335] [2021-06-05 18:20:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:38,555 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:38,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740333335] [2021-06-05 18:20:38,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740333335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175299470] [2021-06-05 18:20:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:38,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-05 18:20:38,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:38,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175299470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:38,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:38,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599111773] [2021-06-05 18:20:38,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:38,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:38,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:38,824 INFO L87 Difference]: Start difference. First operand 4228 states and 11883 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:39,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:39,800 INFO L93 Difference]: Finished difference Result 5679 states and 15263 transitions. [2021-06-05 18:20:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 18:20:39,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:39,805 INFO L225 Difference]: With dead ends: 5679 [2021-06-05 18:20:39,806 INFO L226 Difference]: Without dead ends: 5056 [2021-06-05 18:20:39,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 894.4ms TimeCoverageRelationStatistics Valid=1256, Invalid=3574, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 18:20:39,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-05 18:20:39,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4138. [2021-06-05 18:20:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4137 states have (on average 2.8155668358714045) internal successors, (11648), 4137 states have internal predecessors, (11648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 11648 transitions. [2021-06-05 18:20:39,856 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 11648 transitions. Word has length 130 [2021-06-05 18:20:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:39,856 INFO L482 AbstractCegarLoop]: Abstraction has 4138 states and 11648 transitions. [2021-06-05 18:20:39,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:39,856 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 11648 transitions. [2021-06-05 18:20:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:39,859 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:39,859 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:40,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-05 18:20:40,060 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:40,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:40,060 INFO L82 PathProgramCache]: Analyzing trace with hash -321603147, now seen corresponding path program 204 times [2021-06-05 18:20:40,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:40,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414356145] [2021-06-05 18:20:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:40,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414356145] [2021-06-05 18:20:40,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414356145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856852931] [2021-06-05 18:20:40,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:40,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-05 18:20:40,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:40,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:20:40,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:40,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856852931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:40,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:40,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-06-05 18:20:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128452189] [2021-06-05 18:20:40,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:40,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:40,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:40,439 INFO L87 Difference]: Start difference. First operand 4138 states and 11648 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:41,184 INFO L93 Difference]: Finished difference Result 5908 states and 15981 transitions. [2021-06-05 18:20:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:20:41,184 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:41,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:41,189 INFO L225 Difference]: With dead ends: 5908 [2021-06-05 18:20:41,189 INFO L226 Difference]: Without dead ends: 5638 [2021-06-05 18:20:41,189 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=1238, Invalid=3052, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:20:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5638 states. [2021-06-05 18:20:41,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5638 to 4318. [2021-06-05 18:20:41,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.8276580958999307) internal successors, (12207), 4317 states have internal predecessors, (12207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 12207 transitions. [2021-06-05 18:20:41,236 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 12207 transitions. Word has length 130 [2021-06-05 18:20:41,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:41,237 INFO L482 AbstractCegarLoop]: Abstraction has 4318 states and 12207 transitions. [2021-06-05 18:20:41,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:41,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 12207 transitions. [2021-06-05 18:20:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:41,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:41,240 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:41,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 18:20:41,441 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:41,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:41,441 INFO L82 PathProgramCache]: Analyzing trace with hash -299259897, now seen corresponding path program 205 times [2021-06-05 18:20:41,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:41,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583844759] [2021-06-05 18:20:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583844759] [2021-06-05 18:20:41,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583844759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232618170] [2021-06-05 18:20:41,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:41,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:41,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232618170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:41,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-06-05 18:20:41,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736065881] [2021-06-05 18:20:41,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:41,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:41,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:41,826 INFO L87 Difference]: Start difference. First operand 4318 states and 12207 transitions. Second operand has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:42,711 INFO L93 Difference]: Finished difference Result 5203 states and 14105 transitions. [2021-06-05 18:20:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 18:20:42,711 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-06-05 18:20:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:42,716 INFO L225 Difference]: With dead ends: 5203 [2021-06-05 18:20:42,716 INFO L226 Difference]: Without dead ends: 4831 [2021-06-05 18:20:42,717 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 18:20:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4831 states. [2021-06-05 18:20:42,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4831 to 4233. [2021-06-05 18:20:42,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4232 states have (on average 2.81734404536862) internal successors, (11923), 4232 states have internal predecessors, (11923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:42,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 11923 transitions. [2021-06-05 18:20:42,757 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 11923 transitions. Word has length 130 [2021-06-05 18:20:42,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:42,757 INFO L482 AbstractCegarLoop]: Abstraction has 4233 states and 11923 transitions. [2021-06-05 18:20:42,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 11923 transitions. [2021-06-05 18:20:42,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:20:42,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:42,760 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:42,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 18:20:42,961 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 750131032, now seen corresponding path program 206 times [2021-06-05 18:20:42,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:42,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094378949] [2021-06-05 18:20:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:43,116 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 406 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:43,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094378949] [2021-06-05 18:20:43,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094378949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:43,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068769079] [2021-06-05 18:20:43,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:43,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:43,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:43,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:43,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:43,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068769079] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:43,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:20:43,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-05 18:20:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117648860] [2021-06-05 18:20:43,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:43,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:43,342 INFO L87 Difference]: Start difference. First operand 4233 states and 11923 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:43,672 INFO L93 Difference]: Finished difference Result 19732 states and 54883 transitions. [2021-06-05 18:20:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:43,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:20:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:43,674 INFO L225 Difference]: With dead ends: 19732 [2021-06-05 18:20:43,674 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 18:20:43,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 315.9ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 18:20:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 2029. [2021-06-05 18:20:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 2.5631163708086784) internal successors, (5198), 2028 states have internal predecessors, (5198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 5198 transitions. [2021-06-05 18:20:43,690 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 5198 transitions. Word has length 135 [2021-06-05 18:20:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:43,691 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 5198 transitions. [2021-06-05 18:20:43,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 5198 transitions. [2021-06-05 18:20:43,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-06-05 18:20:43,692 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:43,692 INFO L554 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 18:20:43,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 18:20:43,893 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:43,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:43,893 INFO L82 PathProgramCache]: Analyzing trace with hash -73289105, now seen corresponding path program 207 times [2021-06-05 18:20:43,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:43,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522901529] [2021-06-05 18:20:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 397 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522901529] [2021-06-05 18:20:44,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522901529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:44,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497385237] [2021-06-05 18:20:44,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:44,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-05 18:20:44,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:44,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:20:44,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 443 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497385237] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:20:44,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 18:20:44,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2021-06-05 18:20:44,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962011540] [2021-06-05 18:20:44,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:20:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:44,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:20:44,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:44,315 INFO L87 Difference]: Start difference. First operand 2029 states and 5198 transitions. Second operand has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:44,567 INFO L93 Difference]: Finished difference Result 8213 states and 20540 transitions. [2021-06-05 18:20:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:44,567 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-06-05 18:20:44,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:44,568 INFO L225 Difference]: With dead ends: 8213 [2021-06-05 18:20:44,568 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 18:20:44,568 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:44,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 18:20:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 18:20:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 18:20:44,568 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2021-06-05 18:20:44,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:44,568 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 18:20:44,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.869565217391305) internal successors, (135), 23 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 18:20:44,569 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 18:20:44,569 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 18:20:44,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:44,782 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:20:44,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:20:44 BasicIcfg [2021-06-05 18:20:44,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:20:44,785 INFO L168 Benchmark]: Toolchain (without parser) took 209960.19 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 792.7 MB). Free memory was 318.7 MB in the beginning and 853.2 MB in the end (delta: -534.5 MB). Peak memory consumption was 258.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.0 MB in the beginning and 336.8 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.54 ms. Allocated memory is still 356.5 MB. Free memory was 318.6 MB in the beginning and 319.3 MB in the end (delta: -719.7 kB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.37 ms. Allocated memory is still 356.5 MB. Free memory was 319.3 MB in the beginning and 317.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: Boogie Preprocessor took 14.13 ms. Allocated memory is still 356.5 MB. Free memory was 317.2 MB in the beginning and 316.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: RCFGBuilder took 291.00 ms. Allocated memory is still 356.5 MB. Free memory was 316.2 MB in the beginning and 293.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L168 Benchmark]: TraceAbstraction took 209182.18 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 792.7 MB). Free memory was 292.1 MB in the beginning and 853.2 MB in the end (delta: -561.1 MB). Peak memory consumption was 230.5 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:44,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 337.0 MB in the beginning and 336.8 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 423.54 ms. Allocated memory is still 356.5 MB. Free memory was 318.6 MB in the beginning and 319.3 MB in the end (delta: -719.7 kB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 43.37 ms. Allocated memory is still 356.5 MB. Free memory was 319.3 MB in the beginning and 317.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.13 ms. Allocated memory is still 356.5 MB. Free memory was 317.2 MB in the beginning and 316.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 291.00 ms. Allocated memory is still 356.5 MB. Free memory was 316.2 MB in the beginning and 293.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 209182.18 ms. Allocated memory was 356.5 MB in the beginning and 1.1 GB in the end (delta: 792.7 MB). Free memory was 292.1 MB in the beginning and 853.2 MB in the end (delta: -561.1 MB). Peak memory consumption was 230.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 209088.0ms, OverallIterations: 216, TraceHistogramMax: 11, EmptinessCheckTime: 484.2ms, AutomataDifference: 89537.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21200 SDtfs, 163602 SDslu, 176276 SDs, 0 SdLazy, 31939 SolverSat, 25161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17351.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29971 GetRequests, 20942 SyntacticMatches, 0 SemanticMatches, 9029 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97719 ImplicationChecksByTransitivity, 86339.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4318occurred in iteration=213, InterpolantAutomatonStates: 6728, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6720.8ms AutomataMinimizationTime, 216 MinimizatonAttempts, 175150 StatesRemovedByMinimization, 214 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2153.1ms SsaConstructionTime, 5405.3ms SatisfiabilityAnalysisTime, 54300.8ms InterpolantComputationTime, 42018 NumberOfCodeBlocks, 42018 NumberOfCodeBlocksAsserted, 1201 NumberOfCheckSat, 41592 ConstructedInterpolants, 0 QuantifiedInterpolants, 172074 SizeOfPredicates, 3134 NumberOfNonLiveVariables, 43512 ConjunctsInSsa, 4179 ConjunctsInUnsatCore, 426 InterpolantComputations, 8 PerfectInterpolantSequences, 1690/83616 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...