/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 15:01:35,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 15:01:35,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 15:01:35,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 15:01:35,519 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 15:01:35,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 15:01:35,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 15:01:35,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 15:01:35,521 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 15:01:35,522 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 15:01:35,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 15:01:35,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 15:01:35,525 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 15:01:35,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 15:01:35,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 15:01:35,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 15:01:35,529 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 15:01:35,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 15:01:35,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 15:01:35,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 15:01:35,536 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 [2021-03-10 15:01:35,552 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 15:01:35,552 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 15:01:35,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 15:01:35,553 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 15:01:35,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 15:01:35,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 15:01:35,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 15:01:35,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 15:01:35,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 15:01:35,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 15:01:35,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 15:01:35,556 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 15:01:35,556 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 15:01:35,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 15:01:35,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 15:01:35,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 15:01:35,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 15:01:35,832 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 15:01:35,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-03-10 15:01:35,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366bd1d73/879f57f638d54cfcb1c4c25b6fbc096c/FLAG66cb40fc8 [2021-03-10 15:01:36,363 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 15:01:36,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-03-10 15:01:36,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366bd1d73/879f57f638d54cfcb1c4c25b6fbc096c/FLAG66cb40fc8 [2021-03-10 15:01:36,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/366bd1d73/879f57f638d54cfcb1c4c25b6fbc096c [2021-03-10 15:01:36,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 15:01:36,868 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 15:01:36,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 15:01:36,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 15:01:36,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 15:01:36,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:01:36" (1/1) ... [2021-03-10 15:01:36,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa4d8db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:36, skipping insertion in model container [2021-03-10 15:01:36,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:01:36" (1/1) ... [2021-03-10 15:01:36,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 15:01:36,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 15:01:37,113 WARN L226 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-2.i[30963,30976] [2021-03-10 15:01:37,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:01:37,121 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 15:01:37,155 WARN L226 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-2.i[30963,30976] [2021-03-10 15:01:37,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:01:37,210 INFO L208 MainTranslator]: Completed translation [2021-03-10 15:01:37,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37 WrapperNode [2021-03-10 15:01:37,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 15:01:37,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 15:01:37,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 15:01:37,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 15:01:37,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 15:01:37,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 15:01:37,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 15:01:37,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 15:01:37,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,265 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (1/1) ... [2021-03-10 15:01:37,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 15:01:37,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 15:01:37,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 15:01:37,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 15:01:37,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (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 [2021-03-10 15:01:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 15:01:37,359 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 15:01:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 15:01:37,359 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 15:01:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 15:01:37,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 15:01:37,361 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 15:01:37,642 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 15:01:37,642 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 15:01:37,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:01:37 BoogieIcfgContainer [2021-03-10 15:01:37,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 15:01:37,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 15:01:37,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 15:01:37,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 15:01:37,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 03:01:36" (1/3) ... [2021-03-10 15:01:37,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:01:37, skipping insertion in model container [2021-03-10 15:01:37,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:37" (2/3) ... [2021-03-10 15:01:37,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189f0983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:01:37, skipping insertion in model container [2021-03-10 15:01:37,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:01:37" (3/3) ... [2021-03-10 15:01:37,651 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-03-10 15:01:37,656 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 15:01:37,656 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 15:01:37,659 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 15:01:37,659 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 15:01:37,679 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,680 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,681 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,682 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,682 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,683 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,683 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,684 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,684 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,685 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,685 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,685 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,685 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,686 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,687 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,688 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,689 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,689 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,690 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,690 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,692 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,692 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,692 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,693 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,693 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,693 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,698 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,699 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:37,701 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 15:01:37,713 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 15:01:37,734 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 15:01:37,734 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 15:01:37,734 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 15:01:37,734 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 15:01:37,734 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 15:01:37,735 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 15:01:37,735 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 15:01:37,735 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 15:01:37,745 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 60 transitions, 130 flow [2021-03-10 15:01:37,810 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 15:01:37,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:37,830 INFO L519 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] [2021-03-10 15:01:37,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 962891533, now seen corresponding path program 1 times [2021-03-10 15:01:37,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:37,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340953855] [2021-03-10 15:01:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:38,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340953855] [2021-03-10 15:01:38,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:38,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:38,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482038761] [2021-03-10 15:01:38,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:38,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:38,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:38,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:38,159 INFO L87 Difference]: Start difference. First operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 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 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:38,335 INFO L93 Difference]: Finished difference Result 3235 states and 9383 transitions. [2021-03-10 15:01:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 15:01:38,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-03-10 15:01:38,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:38,361 INFO L225 Difference]: With dead ends: 3235 [2021-03-10 15:01:38,361 INFO L226 Difference]: Without dead ends: 1019 [2021-03-10 15:01:38,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-03-10 15:01:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 759. [2021-03-10 15:01:38,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 2.7018469656992083) internal successors, (2048), 758 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2048 transitions. [2021-03-10 15:01:38,448 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2048 transitions. Word has length 26 [2021-03-10 15:01:38,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:38,449 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2048 transitions. [2021-03-10 15:01:38,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,449 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2048 transitions. [2021-03-10 15:01:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:01:38,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:38,455 INFO L519 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] [2021-03-10 15:01:38,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 15:01:38,455 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1660854806, now seen corresponding path program 1 times [2021-03-10 15:01:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:38,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210168570] [2021-03-10 15:01:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:38,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:38,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210168570] [2021-03-10 15:01:38,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:38,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:38,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135100747] [2021-03-10 15:01:38,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:38,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:38,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:38,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:38,545 INFO L87 Difference]: Start difference. First operand 759 states and 2048 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:38,625 INFO L93 Difference]: Finished difference Result 1683 states and 4456 transitions. [2021-03-10 15:01:38,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:01:38,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-03-10 15:01:38,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:38,634 INFO L225 Difference]: With dead ends: 1683 [2021-03-10 15:01:38,634 INFO L226 Difference]: Without dead ends: 1427 [2021-03-10 15:01:38,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:38,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-03-10 15:01:38,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 878. [2021-03-10 15:01:38,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.692132269099202) internal successors, (2361), 877 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2361 transitions. [2021-03-10 15:01:38,662 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2361 transitions. Word has length 30 [2021-03-10 15:01:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:38,663 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2361 transitions. [2021-03-10 15:01:38,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2361 transitions. [2021-03-10 15:01:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:01:38,664 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:38,664 INFO L519 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] [2021-03-10 15:01:38,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 15:01:38,664 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1932703408, now seen corresponding path program 2 times [2021-03-10 15:01:38,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:38,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742909708] [2021-03-10 15:01:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:38,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742909708] [2021-03-10 15:01:38,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:38,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:38,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924368157] [2021-03-10 15:01:38,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:38,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:38,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:38,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:38,760 INFO L87 Difference]: Start difference. First operand 878 states and 2361 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:38,828 INFO L93 Difference]: Finished difference Result 1123 states and 2913 transitions. [2021-03-10 15:01:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:01:38,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-03-10 15:01:38,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:38,832 INFO L225 Difference]: With dead ends: 1123 [2021-03-10 15:01:38,832 INFO L226 Difference]: Without dead ends: 798 [2021-03-10 15:01:38,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-03-10 15:01:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 698. [2021-03-10 15:01:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 697 states have (on average 2.648493543758967) internal successors, (1846), 697 states have internal predecessors, (1846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1846 transitions. [2021-03-10 15:01:38,847 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1846 transitions. Word has length 30 [2021-03-10 15:01:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:38,847 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1846 transitions. [2021-03-10 15:01:38,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,848 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1846 transitions. [2021-03-10 15:01:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:01:38,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:38,848 INFO L519 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] [2021-03-10 15:01:38,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 15:01:38,849 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1126465904, now seen corresponding path program 1 times [2021-03-10 15:01:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:38,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833964039] [2021-03-10 15:01:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:38,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833964039] [2021-03-10 15:01:38,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:38,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:38,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195149540] [2021-03-10 15:01:38,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:38,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:38,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:38,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:38,931 INFO L87 Difference]: Start difference. First operand 698 states and 1846 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:38,990 INFO L93 Difference]: Finished difference Result 954 states and 2474 transitions. [2021-03-10 15:01:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 15:01:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-03-10 15:01:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:38,994 INFO L225 Difference]: With dead ends: 954 [2021-03-10 15:01:38,994 INFO L226 Difference]: Without dead ends: 738 [2021-03-10 15:01:38,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:38,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-03-10 15:01:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 682. [2021-03-10 15:01:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.6637298091042583) internal successors, (1814), 681 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1814 transitions. [2021-03-10 15:01:39,012 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1814 transitions. Word has length 30 [2021-03-10 15:01:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:39,013 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 1814 transitions. [2021-03-10 15:01:39,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1814 transitions. [2021-03-10 15:01:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:39,016 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:39,016 INFO L519 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] [2021-03-10 15:01:39,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 15:01:39,016 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:39,017 INFO L82 PathProgramCache]: Analyzing trace with hash 815370861, now seen corresponding path program 1 times [2021-03-10 15:01:39,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:39,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553488014] [2021-03-10 15:01:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:39,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553488014] [2021-03-10 15:01:39,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:39,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 15:01:39,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490868550] [2021-03-10 15:01:39,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 15:01:39,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 15:01:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 15:01:39,146 INFO L87 Difference]: Start difference. First operand 682 states and 1814 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:39,255 INFO L93 Difference]: Finished difference Result 1442 states and 3782 transitions. [2021-03-10 15:01:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-03-10 15:01:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:39,284 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 15:01:39,284 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 15:01:39,284 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:39,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 15:01:39,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 727. [2021-03-10 15:01:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.62534435261708) internal successors, (1906), 726 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1906 transitions. [2021-03-10 15:01:39,301 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1906 transitions. Word has length 34 [2021-03-10 15:01:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:39,302 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 1906 transitions. [2021-03-10 15:01:39,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1906 transitions. [2021-03-10 15:01:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:39,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:39,303 INFO L519 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] [2021-03-10 15:01:39,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 15:01:39,303 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:39,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1916820389, now seen corresponding path program 2 times [2021-03-10 15:01:39,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:39,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454520219] [2021-03-10 15:01:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:39,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454520219] [2021-03-10 15:01:39,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:39,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663077062] [2021-03-10 15:01:39,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:39,365 INFO L87 Difference]: Start difference. First operand 727 states and 1906 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:39,454 INFO L93 Difference]: Finished difference Result 1881 states and 4916 transitions. [2021-03-10 15:01:39,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:39,454 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-03-10 15:01:39,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:39,460 INFO L225 Difference]: With dead ends: 1881 [2021-03-10 15:01:39,460 INFO L226 Difference]: Without dead ends: 1614 [2021-03-10 15:01:39,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-03-10 15:01:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 821. [2021-03-10 15:01:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.7085365853658536) internal successors, (2221), 820 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2221 transitions. [2021-03-10 15:01:39,490 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2221 transitions. Word has length 34 [2021-03-10 15:01:39,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:39,490 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2221 transitions. [2021-03-10 15:01:39,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,491 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2221 transitions. [2021-03-10 15:01:39,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:39,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:39,491 INFO L519 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] [2021-03-10 15:01:39,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 15:01:39,492 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:39,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:39,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1894477139, now seen corresponding path program 3 times [2021-03-10 15:01:39,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:39,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412858203] [2021-03-10 15:01:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:39,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412858203] [2021-03-10 15:01:39,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:39,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173681738] [2021-03-10 15:01:39,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:39,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:39,559 INFO L87 Difference]: Start difference. First operand 821 states and 2221 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:39,692 INFO L93 Difference]: Finished difference Result 1149 states and 2989 transitions. [2021-03-10 15:01:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:39,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-03-10 15:01:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:39,699 INFO L225 Difference]: With dead ends: 1149 [2021-03-10 15:01:39,699 INFO L226 Difference]: Without dead ends: 813 [2021-03-10 15:01:39,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 96.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-03-10 15:01:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 694. [2021-03-10 15:01:39,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.6507936507936507) internal successors, (1837), 693 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1837 transitions. [2021-03-10 15:01:39,714 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1837 transitions. Word has length 34 [2021-03-10 15:01:39,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:39,714 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1837 transitions. [2021-03-10 15:01:39,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1837 transitions. [2021-03-10 15:01:39,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:39,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:39,715 INFO L519 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] [2021-03-10 15:01:39,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 15:01:39,716 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1589715209, now seen corresponding path program 4 times [2021-03-10 15:01:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:39,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260368328] [2021-03-10 15:01:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:39,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260368328] [2021-03-10 15:01:39,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:39,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:39,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006706428] [2021-03-10 15:01:39,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:39,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:39,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:39,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:39,799 INFO L87 Difference]: Start difference. First operand 694 states and 1837 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:39,866 INFO L93 Difference]: Finished difference Result 1186 states and 3055 transitions. [2021-03-10 15:01:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:01:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-03-10 15:01:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:39,870 INFO L225 Difference]: With dead ends: 1186 [2021-03-10 15:01:39,870 INFO L226 Difference]: Without dead ends: 962 [2021-03-10 15:01:39,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.4ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:39,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-03-10 15:01:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 804. [2021-03-10 15:01:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.6986301369863015) internal successors, (2167), 803 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2167 transitions. [2021-03-10 15:01:39,887 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2167 transitions. Word has length 34 [2021-03-10 15:01:39,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:39,888 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2167 transitions. [2021-03-10 15:01:39,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2167 transitions. [2021-03-10 15:01:39,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:39,889 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:39,890 INFO L519 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] [2021-03-10 15:01:39,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-10 15:01:39,890 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:39,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:39,890 INFO L82 PathProgramCache]: Analyzing trace with hash 583669760, now seen corresponding path program 1 times [2021-03-10 15:01:39,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:39,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360354505] [2021-03-10 15:01:39,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360354505] [2021-03-10 15:01:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409743858] [2021-03-10 15:01:39,981 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 [2021-03-10 15:01:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:40,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:40,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:40,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 15:01:40,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519789294] [2021-03-10 15:01:40,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:01:40,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:01:40,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:40,201 INFO L87 Difference]: Start difference. First operand 804 states and 2167 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:40,289 INFO L93 Difference]: Finished difference Result 1202 states and 3091 transitions. [2021-03-10 15:01:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 39 [2021-03-10 15:01:40,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:40,293 INFO L225 Difference]: With dead ends: 1202 [2021-03-10 15:01:40,293 INFO L226 Difference]: Without dead ends: 932 [2021-03-10 15:01:40,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-03-10 15:01:40,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 849. [2021-03-10 15:01:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.661556603773585) internal successors, (2257), 848 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2257 transitions. [2021-03-10 15:01:40,317 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2257 transitions. Word has length 39 [2021-03-10 15:01:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:40,317 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2257 transitions. [2021-03-10 15:01:40,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2257 transitions. [2021-03-10 15:01:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:40,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:40,318 INFO L519 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] [2021-03-10 15:01:40,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-03-10 15:01:40,535 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:40,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:40,536 INFO L82 PathProgramCache]: Analyzing trace with hash 550525025, now seen corresponding path program 1 times [2021-03-10 15:01:40,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:40,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597776473] [2021-03-10 15:01:40,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:40,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597776473] [2021-03-10 15:01:40,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064985087] [2021-03-10 15:01:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 15:01:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:40,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:40,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:40,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:40,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:40,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 15:01:40,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550692224] [2021-03-10 15:01:40,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:01:40,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:40,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:01:40,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:40,769 INFO L87 Difference]: Start difference. First operand 849 states and 2257 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:40,855 INFO L93 Difference]: Finished difference Result 1252 states and 3255 transitions. [2021-03-10 15:01:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 39 [2021-03-10 15:01:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:40,859 INFO L225 Difference]: With dead ends: 1252 [2021-03-10 15:01:40,859 INFO L226 Difference]: Without dead ends: 1022 [2021-03-10 15:01:40,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:40,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2021-03-10 15:01:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 819. [2021-03-10 15:01:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.667481662591687) internal successors, (2182), 818 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2182 transitions. [2021-03-10 15:01:40,877 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2182 transitions. Word has length 39 [2021-03-10 15:01:40,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:40,877 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2182 transitions. [2021-03-10 15:01:40,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2182 transitions. [2021-03-10 15:01:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:40,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:40,878 INFO L519 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] [2021-03-10 15:01:41,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 15:01:41,091 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:41,092 INFO L82 PathProgramCache]: Analyzing trace with hash 454497644, now seen corresponding path program 2 times [2021-03-10 15:01:41,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:41,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746626214] [2021-03-10 15:01:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:41,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746626214] [2021-03-10 15:01:41,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909400859] [2021-03-10 15:01:41,152 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 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 [2021-03-10 15:01:41,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:41,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:41,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:41,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:41,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 15:01:41,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969301020] [2021-03-10 15:01:41,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:01:41,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:41,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:01:41,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:41,292 INFO L87 Difference]: Start difference. First operand 819 states and 2182 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:41,416 INFO L93 Difference]: Finished difference Result 2110 states and 5548 transitions. [2021-03-10 15:01:41,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:01:41,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 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 39 [2021-03-10 15:01:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:41,423 INFO L225 Difference]: With dead ends: 2110 [2021-03-10 15:01:41,423 INFO L226 Difference]: Without dead ends: 1840 [2021-03-10 15:01:41,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:01:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-03-10 15:01:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 999. [2021-03-10 15:01:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.753507014028056) internal successors, (2748), 998 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2748 transitions. [2021-03-10 15:01:41,451 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2748 transitions. Word has length 39 [2021-03-10 15:01:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:41,451 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 2748 transitions. [2021-03-10 15:01:41,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2748 transitions. [2021-03-10 15:01:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:41,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:41,452 INFO L519 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] [2021-03-10 15:01:41,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 15:01:41,673 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:41,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:41,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1114070384, now seen corresponding path program 3 times [2021-03-10 15:01:41,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:41,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468877184] [2021-03-10 15:01:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:41,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468877184] [2021-03-10 15:01:41,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017112746] [2021-03-10 15:01:41,731 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 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 [2021-03-10 15:01:41,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 15:01:41,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:41,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:41,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:41,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 15:01:41,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144783772] [2021-03-10 15:01:41,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:41,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:41,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:41,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:41,865 INFO L87 Difference]: Start difference. First operand 999 states and 2748 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:42,095 INFO L93 Difference]: Finished difference Result 1814 states and 4746 transitions. [2021-03-10 15:01:42,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:42,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 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 39 [2021-03-10 15:01:42,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:42,100 INFO L225 Difference]: With dead ends: 1814 [2021-03-10 15:01:42,100 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 15:01:42,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:01:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 15:01:42,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1009. [2021-03-10 15:01:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.7301587301587302) internal successors, (2752), 1008 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2752 transitions. [2021-03-10 15:01:42,126 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2752 transitions. Word has length 39 [2021-03-10 15:01:42,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:42,126 INFO L480 AbstractCegarLoop]: Abstraction has 1009 states and 2752 transitions. [2021-03-10 15:01:42,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2752 transitions. [2021-03-10 15:01:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:42,127 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:42,128 INFO L519 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] [2021-03-10 15:01:42,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:42,348 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:42,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:42,348 INFO L82 PathProgramCache]: Analyzing trace with hash 409344372, now seen corresponding path program 1 times [2021-03-10 15:01:42,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:42,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118631052] [2021-03-10 15:01:42,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:42,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118631052] [2021-03-10 15:01:42,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780436521] [2021-03-10 15:01:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 15:01:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:42,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:42,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:42,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 15:01:42,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366123701] [2021-03-10 15:01:42,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:42,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:42,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:42,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:42,614 INFO L87 Difference]: Start difference. First operand 1009 states and 2752 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:42,774 INFO L93 Difference]: Finished difference Result 1749 states and 4552 transitions. [2021-03-10 15:01:42,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:42,775 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 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 44 [2021-03-10 15:01:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:42,780 INFO L225 Difference]: With dead ends: 1749 [2021-03-10 15:01:42,780 INFO L226 Difference]: Without dead ends: 1415 [2021-03-10 15:01:42,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:01:42,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-03-10 15:01:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1094. [2021-03-10 15:01:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 2.6733760292772186) internal successors, (2922), 1093 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2922 transitions. [2021-03-10 15:01:42,804 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2922 transitions. Word has length 44 [2021-03-10 15:01:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:42,804 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 2922 transitions. [2021-03-10 15:01:42,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2922 transitions. [2021-03-10 15:01:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:42,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:42,806 INFO L519 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] [2021-03-10 15:01:43,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 15:01:43,015 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:43,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1518934498, now seen corresponding path program 2 times [2021-03-10 15:01:43,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:43,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294810998] [2021-03-10 15:01:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294810998] [2021-03-10 15:01:43,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335445879] [2021-03-10 15:01:43,085 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 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 [2021-03-10 15:01:43,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:43,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:43,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:43,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:43,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 15:01:43,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120385681] [2021-03-10 15:01:43,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:01:43,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:43,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:01:43,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:43,220 INFO L87 Difference]: Start difference. First operand 1094 states and 2922 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:43,310 INFO L93 Difference]: Finished difference Result 1742 states and 4346 transitions. [2021-03-10 15:01:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 15:01:43,310 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-03-10 15:01:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:43,316 INFO L225 Difference]: With dead ends: 1742 [2021-03-10 15:01:43,316 INFO L226 Difference]: Without dead ends: 1472 [2021-03-10 15:01:43,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:01:43,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-03-10 15:01:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1109. [2021-03-10 15:01:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 1108 states have (on average 2.664259927797834) internal successors, (2952), 1108 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 2952 transitions. [2021-03-10 15:01:43,343 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 2952 transitions. Word has length 44 [2021-03-10 15:01:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:43,343 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 2952 transitions. [2021-03-10 15:01:43,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 2952 transitions. [2021-03-10 15:01:43,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:43,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:43,348 INFO L519 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] [2021-03-10 15:01:43,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:43,565 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:43,565 INFO L82 PathProgramCache]: Analyzing trace with hash -580194750, now seen corresponding path program 3 times [2021-03-10 15:01:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:43,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018250407] [2021-03-10 15:01:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:43,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018250407] [2021-03-10 15:01:43,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418667557] [2021-03-10 15:01:43,627 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 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 [2021-03-10 15:01:43,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 15:01:43,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:43,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:43,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:43,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:43,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-03-10 15:01:43,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252500955] [2021-03-10 15:01:43,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:01:43,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:43,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:01:43,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:43,766 INFO L87 Difference]: Start difference. First operand 1109 states and 2952 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:43,914 INFO L93 Difference]: Finished difference Result 2425 states and 6308 transitions. [2021-03-10 15:01:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:01:43,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-03-10 15:01:43,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:43,933 INFO L225 Difference]: With dead ends: 2425 [2021-03-10 15:01:43,933 INFO L226 Difference]: Without dead ends: 2155 [2021-03-10 15:01:43,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:01:43,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-10 15:01:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1234. [2021-03-10 15:01:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.7153284671532845) internal successors, (3348), 1233 states have internal predecessors, (3348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3348 transitions. [2021-03-10 15:01:43,971 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3348 transitions. Word has length 44 [2021-03-10 15:01:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:43,971 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 3348 transitions. [2021-03-10 15:01:43,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3348 transitions. [2021-03-10 15:01:43,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:43,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:43,974 INFO L519 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] [2021-03-10 15:01:44,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 15:01:44,193 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash 79377990, now seen corresponding path program 4 times [2021-03-10 15:01:44,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:44,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321186997] [2021-03-10 15:01:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:44,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321186997] [2021-03-10 15:01:44,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950660694] [2021-03-10 15:01:44,243 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 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 [2021-03-10 15:01:44,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:44,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:44,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:44,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:01:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400934143] [2021-03-10 15:01:44,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:44,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:44,371 INFO L87 Difference]: Start difference. First operand 1234 states and 3348 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:44,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:44,554 INFO L93 Difference]: Finished difference Result 1823 states and 4766 transitions. [2021-03-10 15:01:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:01:44,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 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 44 [2021-03-10 15:01:44,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:44,558 INFO L225 Difference]: With dead ends: 1823 [2021-03-10 15:01:44,558 INFO L226 Difference]: Without dead ends: 1352 [2021-03-10 15:01:44,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:01:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-03-10 15:01:44,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1024. [2021-03-10 15:01:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.6803519061583576) internal successors, (2742), 1023 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2742 transitions. [2021-03-10 15:01:44,583 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2742 transitions. Word has length 44 [2021-03-10 15:01:44,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:44,583 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2742 transitions. [2021-03-10 15:01:44,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:44,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2742 transitions. [2021-03-10 15:01:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:44,584 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:44,584 INFO L519 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] [2021-03-10 15:01:44,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 15:01:44,801 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:44,802 INFO L82 PathProgramCache]: Analyzing trace with hash -800989155, now seen corresponding path program 5 times [2021-03-10 15:01:44,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496086687] [2021-03-10 15:01:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:44,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496086687] [2021-03-10 15:01:44,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456012212] [2021-03-10 15:01:44,888 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 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 [2021-03-10 15:01:44,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 15:01:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:44,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:45,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:45,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:45,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:45,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433322301] [2021-03-10 15:01:45,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:45,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:45,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:45,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:45,024 INFO L87 Difference]: Start difference. First operand 1024 states and 2742 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:45,158 INFO L93 Difference]: Finished difference Result 1617 states and 4106 transitions. [2021-03-10 15:01:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:45,158 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-03-10 15:01:45,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:45,161 INFO L225 Difference]: With dead ends: 1617 [2021-03-10 15:01:45,161 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 15:01:45,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:01:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 15:01:45,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1074. [2021-03-10 15:01:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.69524697110904) internal successors, (2892), 1073 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2892 transitions. [2021-03-10 15:01:45,180 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2892 transitions. Word has length 49 [2021-03-10 15:01:45,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:45,180 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 2892 transitions. [2021-03-10 15:01:45,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,180 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2892 transitions. [2021-03-10 15:01:45,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:45,181 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:45,181 INFO L519 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] [2021-03-10 15:01:45,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 15:01:45,395 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:45,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1077315557, now seen corresponding path program 6 times [2021-03-10 15:01:45,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:45,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765487087] [2021-03-10 15:01:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:45,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765487087] [2021-03-10 15:01:45,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779047933] [2021-03-10 15:01:45,485 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 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 [2021-03-10 15:01:45,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 15:01:45,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:45,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:45,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:45,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853051608] [2021-03-10 15:01:45,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:45,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:45,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:45,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:45,645 INFO L87 Difference]: Start difference. First operand 1074 states and 2892 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:45,831 INFO L93 Difference]: Finished difference Result 2465 states and 6458 transitions. [2021-03-10 15:01:45,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:45,832 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-03-10 15:01:45,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:45,837 INFO L225 Difference]: With dead ends: 2465 [2021-03-10 15:01:45,837 INFO L226 Difference]: Without dead ends: 2195 [2021-03-10 15:01:45,837 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:45,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-03-10 15:01:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1249. [2021-03-10 15:01:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.7628205128205128) internal successors, (3448), 1248 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3448 transitions. [2021-03-10 15:01:45,863 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3448 transitions. Word has length 49 [2021-03-10 15:01:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:45,863 INFO L480 AbstractCegarLoop]: Abstraction has 1249 states and 3448 transitions. [2021-03-10 15:01:45,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:45,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3448 transitions. [2021-03-10 15:01:45,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:45,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:45,865 INFO L519 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] [2021-03-10 15:01:46,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:46,080 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:46,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:46,080 INFO L82 PathProgramCache]: Analyzing trace with hash -417742817, now seen corresponding path program 7 times [2021-03-10 15:01:46,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:46,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484260225] [2021-03-10 15:01:46,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484260225] [2021-03-10 15:01:46,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517296036] [2021-03-10 15:01:46,153 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 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 [2021-03-10 15:01:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:46,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:46,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:46,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:46,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:46,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36123564] [2021-03-10 15:01:46,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:46,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:46,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:46,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:46,280 INFO L87 Difference]: Start difference. First operand 1249 states and 3448 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:46,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:46,550 INFO L93 Difference]: Finished difference Result 1838 states and 4866 transitions. [2021-03-10 15:01:46,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:46,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 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 49 [2021-03-10 15:01:46,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:46,553 INFO L225 Difference]: With dead ends: 1838 [2021-03-10 15:01:46,553 INFO L226 Difference]: Without dead ends: 1427 [2021-03-10 15:01:46,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:01:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-03-10 15:01:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 963. [2021-03-10 15:01:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 2.686070686070686) internal successors, (2584), 962 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:46,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 2584 transitions. [2021-03-10 15:01:46,570 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 2584 transitions. Word has length 49 [2021-03-10 15:01:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:46,570 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 2584 transitions. [2021-03-10 15:01:46,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 2584 transitions. [2021-03-10 15:01:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:46,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:46,571 INFO L519 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] [2021-03-10 15:01:46,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:46,779 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -255755739, now seen corresponding path program 8 times [2021-03-10 15:01:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:46,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268531415] [2021-03-10 15:01:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:46,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268531415] [2021-03-10 15:01:46,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403219565] [2021-03-10 15:01:46,860 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 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 [2021-03-10 15:01:46,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:47,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:47,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 15:01:47,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560284820] [2021-03-10 15:01:47,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:47,012 INFO L87 Difference]: Start difference. First operand 963 states and 2584 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:47,222 INFO L93 Difference]: Finished difference Result 1753 states and 4484 transitions. [2021-03-10 15:01:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:01:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 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 54 [2021-03-10 15:01:47,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:47,225 INFO L225 Difference]: With dead ends: 1753 [2021-03-10 15:01:47,225 INFO L226 Difference]: Without dead ends: 1419 [2021-03-10 15:01:47,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-03-10 15:01:47,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-03-10 15:01:47,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1048. [2021-03-10 15:01:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.6303724928366763) internal successors, (2754), 1047 states have internal predecessors, (2754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2754 transitions. [2021-03-10 15:01:47,243 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2754 transitions. Word has length 54 [2021-03-10 15:01:47,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:47,243 INFO L480 AbstractCegarLoop]: Abstraction has 1048 states and 2754 transitions. [2021-03-10 15:01:47,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2754 transitions. [2021-03-10 15:01:47,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:47,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:47,248 INFO L519 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] [2021-03-10 15:01:47,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:47,464 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:47,464 INFO L82 PathProgramCache]: Analyzing trace with hash 493439251, now seen corresponding path program 9 times [2021-03-10 15:01:47,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:47,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134871110] [2021-03-10 15:01:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:47,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134871110] [2021-03-10 15:01:47,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297030464] [2021-03-10 15:01:47,534 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 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 [2021-03-10 15:01:47,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:01:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:47,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:47,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:47,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40355591] [2021-03-10 15:01:47,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:47,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:47,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:47,680 INFO L87 Difference]: Start difference. First operand 1048 states and 2754 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:47,802 INFO L93 Difference]: Finished difference Result 1932 states and 4736 transitions. [2021-03-10 15:01:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:01:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-03-10 15:01:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:47,805 INFO L225 Difference]: With dead ends: 1932 [2021-03-10 15:01:47,805 INFO L226 Difference]: Without dead ends: 1662 [2021-03-10 15:01:47,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 15:01:47,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2021-03-10 15:01:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1149. [2021-03-10 15:01:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 2.6498257839721253) internal successors, (3042), 1148 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3042 transitions. [2021-03-10 15:01:47,834 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3042 transitions. Word has length 54 [2021-03-10 15:01:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:47,834 INFO L480 AbstractCegarLoop]: Abstraction has 1149 states and 3042 transitions. [2021-03-10 15:01:47,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3042 transitions. [2021-03-10 15:01:47,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:47,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:47,837 INFO L519 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] [2021-03-10 15:01:48,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 15:01:48,051 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1960125811, now seen corresponding path program 10 times [2021-03-10 15:01:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:48,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679273471] [2021-03-10 15:01:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:48,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679273471] [2021-03-10 15:01:48,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037588257] [2021-03-10 15:01:48,124 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 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 [2021-03-10 15:01:48,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:48,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:48,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:48,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:48,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:48,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:48,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212332453] [2021-03-10 15:01:48,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:48,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:48,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:48,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:48,244 INFO L87 Difference]: Start difference. First operand 1149 states and 3042 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:48,409 INFO L93 Difference]: Finished difference Result 1917 states and 4806 transitions. [2021-03-10 15:01:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:01:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-03-10 15:01:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:48,412 INFO L225 Difference]: With dead ends: 1917 [2021-03-10 15:01:48,412 INFO L226 Difference]: Without dead ends: 1647 [2021-03-10 15:01:48,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:01:48,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-03-10 15:01:48,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1249. [2021-03-10 15:01:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.6778846153846154) internal successors, (3342), 1248 states have internal predecessors, (3342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3342 transitions. [2021-03-10 15:01:48,432 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3342 transitions. Word has length 54 [2021-03-10 15:01:48,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:48,433 INFO L480 AbstractCegarLoop]: Abstraction has 1249 states and 3342 transitions. [2021-03-10 15:01:48,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3342 transitions. [2021-03-10 15:01:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:48,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:48,434 INFO L519 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] [2021-03-10 15:01:48,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:48,643 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1683799409, now seen corresponding path program 11 times [2021-03-10 15:01:48,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:48,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100605664] [2021-03-10 15:01:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:48,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100605664] [2021-03-10 15:01:48,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795779573] [2021-03-10 15:01:48,706 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 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 [2021-03-10 15:01:48,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 15:01:48,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:48,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:48,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:48,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688044149] [2021-03-10 15:01:48,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:48,836 INFO L87 Difference]: Start difference. First operand 1249 states and 3342 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:49,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:49,016 INFO L93 Difference]: Finished difference Result 2665 states and 6958 transitions. [2021-03-10 15:01:49,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:49,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-03-10 15:01:49,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:49,021 INFO L225 Difference]: With dead ends: 2665 [2021-03-10 15:01:49,021 INFO L226 Difference]: Without dead ends: 2395 [2021-03-10 15:01:49,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-03-10 15:01:49,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 1424. [2021-03-10 15:01:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.7392832044975406) internal successors, (3898), 1423 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3898 transitions. [2021-03-10 15:01:49,049 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3898 transitions. Word has length 54 [2021-03-10 15:01:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:49,049 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 3898 transitions. [2021-03-10 15:01:49,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3898 transitions. [2021-03-10 15:01:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:49,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:49,050 INFO L519 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] [2021-03-10 15:01:49,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 15:01:49,263 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1951595147, now seen corresponding path program 12 times [2021-03-10 15:01:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:49,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798788467] [2021-03-10 15:01:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:49,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798788467] [2021-03-10 15:01:49,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663938960] [2021-03-10 15:01:49,333 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 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 [2021-03-10 15:01:49,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 15:01:49,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:49,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:49,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:49,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:49,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 15:01:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150560619] [2021-03-10 15:01:49,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:49,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:49,469 INFO L87 Difference]: Start difference. First operand 1424 states and 3898 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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) [2021-03-10 15:01:49,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:49,752 INFO L93 Difference]: Finished difference Result 2479 states and 6456 transitions. [2021-03-10 15:01:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:49,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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 54 [2021-03-10 15:01:49,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:49,756 INFO L225 Difference]: With dead ends: 2479 [2021-03-10 15:01:49,756 INFO L226 Difference]: Without dead ends: 1952 [2021-03-10 15:01:49,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-03-10 15:01:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-03-10 15:01:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1434. [2021-03-10 15:01:49,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.7229588276343337) internal successors, (3902), 1433 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3902 transitions. [2021-03-10 15:01:49,779 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3902 transitions. Word has length 54 [2021-03-10 15:01:49,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:49,779 INFO L480 AbstractCegarLoop]: Abstraction has 1434 states and 3902 transitions. [2021-03-10 15:01:49,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 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) [2021-03-10 15:01:49,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3902 transitions. [2021-03-10 15:01:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:49,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:49,781 INFO L519 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] [2021-03-10 15:01:49,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:49,995 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:49,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:49,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1556878, now seen corresponding path program 13 times [2021-03-10 15:01:49,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:49,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112083967] [2021-03-10 15:01:49,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112083967] [2021-03-10 15:01:50,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183125307] [2021-03-10 15:01:50,067 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 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 [2021-03-10 15:01:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:50,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:50,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:50,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110159327] [2021-03-10 15:01:50,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:50,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:50,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:50,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:50,212 INFO L87 Difference]: Start difference. First operand 1434 states and 3902 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) [2021-03-10 15:01:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:50,399 INFO L93 Difference]: Finished difference Result 2077 states and 5316 transitions. [2021-03-10 15:01:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:01:50,400 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 59 [2021-03-10 15:01:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:50,403 INFO L225 Difference]: With dead ends: 2077 [2021-03-10 15:01:50,403 INFO L226 Difference]: Without dead ends: 1807 [2021-03-10 15:01:50,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:50,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-03-10 15:01:50,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1434. [2021-03-10 15:01:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.7229588276343337) internal successors, (3902), 1433 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:50,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3902 transitions. [2021-03-10 15:01:50,423 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3902 transitions. Word has length 59 [2021-03-10 15:01:50,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:50,423 INFO L480 AbstractCegarLoop]: Abstraction has 1434 states and 3902 transitions. [2021-03-10 15:01:50,423 INFO L481 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) [2021-03-10 15:01:50,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3902 transitions. [2021-03-10 15:01:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:50,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:50,425 INFO L519 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] [2021-03-10 15:01:50,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 15:01:50,641 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:50,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:50,642 INFO L82 PathProgramCache]: Analyzing trace with hash 322434060, now seen corresponding path program 14 times [2021-03-10 15:01:50,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:50,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29278911] [2021-03-10 15:01:50,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:50,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29278911] [2021-03-10 15:01:50,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647773891] [2021-03-10 15:01:50,713 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 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 [2021-03-10 15:01:50,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:50,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:50,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:50,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:50,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:50,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368163130] [2021-03-10 15:01:50,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:50,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:50,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:50,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:50,855 INFO L87 Difference]: Start difference. First operand 1434 states and 3902 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) [2021-03-10 15:01:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:51,065 INFO L93 Difference]: Finished difference Result 2152 states and 5466 transitions. [2021-03-10 15:01:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:51,066 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 59 [2021-03-10 15:01:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:51,069 INFO L225 Difference]: With dead ends: 2152 [2021-03-10 15:01:51,069 INFO L226 Difference]: Without dead ends: 1882 [2021-03-10 15:01:51,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-03-10 15:01:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-03-10 15:01:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1434. [2021-03-10 15:01:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.7229588276343337) internal successors, (3902), 1433 states have internal predecessors, (3902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:51,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3902 transitions. [2021-03-10 15:01:51,099 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3902 transitions. Word has length 59 [2021-03-10 15:01:51,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:51,099 INFO L480 AbstractCegarLoop]: Abstraction has 1434 states and 3902 transitions. [2021-03-10 15:01:51,099 INFO L481 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) [2021-03-10 15:01:51,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3902 transitions. [2021-03-10 15:01:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:51,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:51,103 INFO L519 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] [2021-03-10 15:01:51,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 15:01:51,315 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:51,316 INFO L82 PathProgramCache]: Analyzing trace with hash 46107658, now seen corresponding path program 15 times [2021-03-10 15:01:51,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:51,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595694722] [2021-03-10 15:01:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595694722] [2021-03-10 15:01:51,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235465253] [2021-03-10 15:01:51,384 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 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 [2021-03-10 15:01:51,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:01:51,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:51,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:51,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:51,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:51,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:51,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618629175] [2021-03-10 15:01:51,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:51,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:51,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:51,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:51,505 INFO L87 Difference]: Start difference. First operand 1434 states and 3902 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) [2021-03-10 15:01:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:51,718 INFO L93 Difference]: Finished difference Result 2825 states and 7408 transitions. [2021-03-10 15:01:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:51,718 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 59 [2021-03-10 15:01:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:51,723 INFO L225 Difference]: With dead ends: 2825 [2021-03-10 15:01:51,723 INFO L226 Difference]: Without dead ends: 2555 [2021-03-10 15:01:51,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:01:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2555 states. [2021-03-10 15:01:51,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2555 to 1559. [2021-03-10 15:01:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 2.7586649550706035) internal successors, (4298), 1558 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 4298 transitions. [2021-03-10 15:01:51,754 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 4298 transitions. Word has length 59 [2021-03-10 15:01:51,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:51,754 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 4298 transitions. [2021-03-10 15:01:51,755 INFO L481 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) [2021-03-10 15:01:51,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 4298 transitions. [2021-03-10 15:01:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:51,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:51,756 INFO L519 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] [2021-03-10 15:01:51,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 15:01:51,963 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:51,964 INFO L82 PathProgramCache]: Analyzing trace with hash 705680398, now seen corresponding path program 16 times [2021-03-10 15:01:51,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:51,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008442989] [2021-03-10 15:01:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:52,031 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008442989] [2021-03-10 15:01:52,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204245181] [2021-03-10 15:01:52,031 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 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 [2021-03-10 15:01:52,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:52,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:52,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:52,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 15:01:52,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471749094] [2021-03-10 15:01:52,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:52,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:52,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:52,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:52,191 INFO L87 Difference]: Start difference. First operand 1559 states and 4298 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 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) [2021-03-10 15:01:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:52,537 INFO L93 Difference]: Finished difference Result 2579 states and 6756 transitions. [2021-03-10 15:01:52,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:52,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 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 59 [2021-03-10 15:01:52,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:52,540 INFO L225 Difference]: With dead ends: 2579 [2021-03-10 15:01:52,541 INFO L226 Difference]: Without dead ends: 2052 [2021-03-10 15:01:52,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:01:52,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-03-10 15:01:52,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1173. [2021-03-10 15:01:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.674061433447099) internal successors, (3134), 1172 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3134 transitions. [2021-03-10 15:01:52,560 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3134 transitions. Word has length 59 [2021-03-10 15:01:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:52,560 INFO L480 AbstractCegarLoop]: Abstraction has 1173 states and 3134 transitions. [2021-03-10 15:01:52,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 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) [2021-03-10 15:01:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3134 transitions. [2021-03-10 15:01:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:52,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:52,561 INFO L519 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] [2021-03-10 15:01:52,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 15:01:52,778 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:52,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:52,778 INFO L82 PathProgramCache]: Analyzing trace with hash 142897558, now seen corresponding path program 17 times [2021-03-10 15:01:52,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:52,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157066739] [2021-03-10 15:01:52,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157066739] [2021-03-10 15:01:52,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557357687] [2021-03-10 15:01:52,885 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 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 [2021-03-10 15:01:52,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 15:01:52,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:52,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:52,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:53,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:53,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-03-10 15:01:53,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141792671] [2021-03-10 15:01:53,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:01:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:01:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:01:53,056 INFO L87 Difference]: Start difference. First operand 1173 states and 3134 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2021-03-10 15:01:53,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:53,271 INFO L93 Difference]: Finished difference Result 2013 states and 5134 transitions. [2021-03-10 15:01:53,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:01:53,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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 64 [2021-03-10 15:01:53,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:53,274 INFO L225 Difference]: With dead ends: 2013 [2021-03-10 15:01:53,274 INFO L226 Difference]: Without dead ends: 1679 [2021-03-10 15:01:53,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:01:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-03-10 15:01:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1258. [2021-03-10 15:01:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 2.628480509148767) internal successors, (3304), 1257 states have internal predecessors, (3304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 3304 transitions. [2021-03-10 15:01:53,293 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 3304 transitions. Word has length 64 [2021-03-10 15:01:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:53,294 INFO L480 AbstractCegarLoop]: Abstraction has 1258 states and 3304 transitions. [2021-03-10 15:01:53,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 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) [2021-03-10 15:01:53,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 3304 transitions. [2021-03-10 15:01:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:53,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:53,296 INFO L519 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] [2021-03-10 15:01:53,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:53,511 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1155591940, now seen corresponding path program 18 times [2021-03-10 15:01:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:53,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272758828] [2021-03-10 15:01:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272758828] [2021-03-10 15:01:53,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733125080] [2021-03-10 15:01:53,627 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 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 [2021-03-10 15:01:53,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:01:53,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:53,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:01:53,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:53,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:53,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:53,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273531860] [2021-03-10 15:01:53,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:53,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:53,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:53,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:53,807 INFO L87 Difference]: Start difference. First operand 1258 states and 3304 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:53,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:53,948 INFO L93 Difference]: Finished difference Result 2292 states and 5586 transitions. [2021-03-10 15:01:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:53,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-03-10 15:01:53,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:53,951 INFO L225 Difference]: With dead ends: 2292 [2021-03-10 15:01:53,951 INFO L226 Difference]: Without dead ends: 2022 [2021-03-10 15:01:53,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:01:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2021-03-10 15:01:53,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1359. [2021-03-10 15:01:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.6450662739322532) internal successors, (3592), 1358 states have internal predecessors, (3592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:53,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3592 transitions. [2021-03-10 15:01:53,974 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3592 transitions. Word has length 64 [2021-03-10 15:01:53,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:53,974 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3592 transitions. [2021-03-10 15:01:53,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:53,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3592 transitions. [2021-03-10 15:01:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:53,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:53,976 INFO L519 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] [2021-03-10 15:01:54,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:54,183 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:54,184 INFO L82 PathProgramCache]: Analyzing trace with hash -236137628, now seen corresponding path program 19 times [2021-03-10 15:01:54,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:54,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001573445] [2021-03-10 15:01:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:54,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001573445] [2021-03-10 15:01:54,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147474710] [2021-03-10 15:01:54,270 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 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 [2021-03-10 15:01:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:54,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:54,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:54,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:54,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:54,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:54,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333123496] [2021-03-10 15:01:54,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:54,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:54,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:54,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:54,411 INFO L87 Difference]: Start difference. First operand 1359 states and 3592 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:54,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:54,591 INFO L93 Difference]: Finished difference Result 2277 states and 5656 transitions. [2021-03-10 15:01:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-03-10 15:01:54,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:54,594 INFO L225 Difference]: With dead ends: 2277 [2021-03-10 15:01:54,594 INFO L226 Difference]: Without dead ends: 2007 [2021-03-10 15:01:54,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-03-10 15:01:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2007 states. [2021-03-10 15:01:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2007 to 1459. [2021-03-10 15:01:54,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1459 states, 1458 states have (on average 2.6694101508916326) internal successors, (3892), 1458 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1459 states to 1459 states and 3892 transitions. [2021-03-10 15:01:54,615 INFO L78 Accepts]: Start accepts. Automaton has 1459 states and 3892 transitions. Word has length 64 [2021-03-10 15:01:54,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:54,615 INFO L480 AbstractCegarLoop]: Abstraction has 1459 states and 3892 transitions. [2021-03-10 15:01:54,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:54,615 INFO L276 IsEmpty]: Start isEmpty. Operand 1459 states and 3892 transitions. [2021-03-10 15:01:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:54,617 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:54,617 INFO L519 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] [2021-03-10 15:01:54,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 15:01:54,831 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash 84739554, now seen corresponding path program 20 times [2021-03-10 15:01:54,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:54,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165796373] [2021-03-10 15:01:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:54,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165796373] [2021-03-10 15:01:54,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340569879] [2021-03-10 15:01:54,912 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 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 [2021-03-10 15:01:54,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:54,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:54,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:54,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:55,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:55,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:55,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:55,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48505684] [2021-03-10 15:01:55,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:55,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:55,059 INFO L87 Difference]: Start difference. First operand 1459 states and 3892 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:55,282 INFO L93 Difference]: Finished difference Result 2307 states and 5831 transitions. [2021-03-10 15:01:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-03-10 15:01:55,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:55,285 INFO L225 Difference]: With dead ends: 2307 [2021-03-10 15:01:55,285 INFO L226 Difference]: Without dead ends: 2037 [2021-03-10 15:01:55,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:01:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2021-03-10 15:01:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1559. [2021-03-10 15:01:55,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 2.6970474967907574) internal successors, (4202), 1558 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 4202 transitions. [2021-03-10 15:01:55,308 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 4202 transitions. Word has length 64 [2021-03-10 15:01:55,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:55,308 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 4202 transitions. [2021-03-10 15:01:55,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:55,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 4202 transitions. [2021-03-10 15:01:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:55,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:55,310 INFO L519 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] [2021-03-10 15:01:55,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:55,523 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:55,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -191586848, now seen corresponding path program 21 times [2021-03-10 15:01:55,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:55,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641488721] [2021-03-10 15:01:55,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:55,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641488721] [2021-03-10 15:01:55,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540352804] [2021-03-10 15:01:55,596 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 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 [2021-03-10 15:01:55,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:01:55,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:55,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:55,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:55,728 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:55,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:55,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562890654] [2021-03-10 15:01:55,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:55,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:55,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:55,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:55,729 INFO L87 Difference]: Start difference. First operand 1559 states and 4202 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:56,013 INFO L93 Difference]: Finished difference Result 3341 states and 8762 transitions. [2021-03-10 15:01:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:01:56,013 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-03-10 15:01:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:56,017 INFO L225 Difference]: With dead ends: 3341 [2021-03-10 15:01:56,017 INFO L226 Difference]: Without dead ends: 2860 [2021-03-10 15:01:56,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:01:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-03-10 15:01:56,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 1734. [2021-03-10 15:01:56,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.739757645701096) internal successors, (4748), 1733 states have internal predecessors, (4748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 4748 transitions. [2021-03-10 15:01:56,047 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 4748 transitions. Word has length 64 [2021-03-10 15:01:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:56,047 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 4748 transitions. [2021-03-10 15:01:56,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 4748 transitions. [2021-03-10 15:01:56,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:56,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:56,049 INFO L519 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] [2021-03-10 15:01:56,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 15:01:56,263 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:56,264 INFO L82 PathProgramCache]: Analyzing trace with hash 467985892, now seen corresponding path program 22 times [2021-03-10 15:01:56,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:56,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150973415] [2021-03-10 15:01:56,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150973415] [2021-03-10 15:01:56,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037436738] [2021-03-10 15:01:56,352 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 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 [2021-03-10 15:01:56,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:56,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:56,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211009515] [2021-03-10 15:01:56,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:56,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:56,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:56,498 INFO L87 Difference]: Start difference. First operand 1734 states and 4748 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:56,828 INFO L93 Difference]: Finished difference Result 2423 states and 6366 transitions. [2021-03-10 15:01:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 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 64 [2021-03-10 15:01:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:56,831 INFO L225 Difference]: With dead ends: 2423 [2021-03-10 15:01:56,831 INFO L226 Difference]: Without dead ends: 1952 [2021-03-10 15:01:56,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 15:01:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-03-10 15:01:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1324. [2021-03-10 15:01:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.677248677248677) internal successors, (3542), 1323 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3542 transitions. [2021-03-10 15:01:56,849 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3542 transitions. Word has length 64 [2021-03-10 15:01:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:56,849 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3542 transitions. [2021-03-10 15:01:56,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3542 transitions. [2021-03-10 15:01:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:56,851 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:56,851 INFO L519 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] [2021-03-10 15:01:57,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 15:01:57,067 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash -474265153, now seen corresponding path program 23 times [2021-03-10 15:01:57,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:57,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110386752] [2021-03-10 15:01:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110386752] [2021-03-10 15:01:57,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629241898] [2021-03-10 15:01:57,157 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 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 [2021-03-10 15:01:57,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 15:01:57,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:57,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:57,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:57,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404824964] [2021-03-10 15:01:57,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:57,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:57,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:57,287 INFO L87 Difference]: Start difference. First operand 1324 states and 3542 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) [2021-03-10 15:01:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:57,490 INFO L93 Difference]: Finished difference Result 2117 states and 5306 transitions. [2021-03-10 15:01:57,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:01:57,490 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 69 [2021-03-10 15:01:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:57,492 INFO L225 Difference]: With dead ends: 2117 [2021-03-10 15:01:57,492 INFO L226 Difference]: Without dead ends: 1847 [2021-03-10 15:01:57,493 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-03-10 15:01:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-03-10 15:01:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1374. [2021-03-10 15:01:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.689002184996358) internal successors, (3692), 1373 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:57,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 3692 transitions. [2021-03-10 15:01:57,508 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 3692 transitions. Word has length 69 [2021-03-10 15:01:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:57,509 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 3692 transitions. [2021-03-10 15:01:57,509 INFO L481 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) [2021-03-10 15:01:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 3692 transitions. [2021-03-10 15:01:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:57,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:57,510 INFO L519 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] [2021-03-10 15:01:57,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 15:01:57,723 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2108361027, now seen corresponding path program 24 times [2021-03-10 15:01:57,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:57,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7673537] [2021-03-10 15:01:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:57,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7673537] [2021-03-10 15:01:57,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294474960] [2021-03-10 15:01:57,812 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 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 [2021-03-10 15:01:57,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:01:57,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:57,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:57,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:57,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636556770] [2021-03-10 15:01:57,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:57,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:57,950 INFO L87 Difference]: Start difference. First operand 1374 states and 3692 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) [2021-03-10 15:01:58,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:58,181 INFO L93 Difference]: Finished difference Result 2342 states and 5856 transitions. [2021-03-10 15:01:58,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:58,181 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 69 [2021-03-10 15:01:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:58,183 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:01:58,183 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:01:58,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:01:58,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:01:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1474. [2021-03-10 15:01:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.7101154107264085) internal successors, (3992), 1473 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:58,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3992 transitions. [2021-03-10 15:01:58,201 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3992 transitions. Word has length 69 [2021-03-10 15:01:58,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:58,201 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3992 transitions. [2021-03-10 15:01:58,201 INFO L481 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) [2021-03-10 15:01:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3992 transitions. [2021-03-10 15:01:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:58,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:58,203 INFO L519 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] [2021-03-10 15:01:58,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 15:01:58,409 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:58,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1787483845, now seen corresponding path program 25 times [2021-03-10 15:01:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:58,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645760833] [2021-03-10 15:01:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:58,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645760833] [2021-03-10 15:01:58,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095235143] [2021-03-10 15:01:58,521 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 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 [2021-03-10 15:01:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:58,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:58,676 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:58,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:58,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993364267] [2021-03-10 15:01:58,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:58,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:58,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:58,677 INFO L87 Difference]: Start difference. First operand 1474 states and 3992 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) [2021-03-10 15:01:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:58,924 INFO L93 Difference]: Finished difference Result 2342 states and 5956 transitions. [2021-03-10 15:01:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:58,924 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 69 [2021-03-10 15:01:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:58,927 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:01:58,927 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:01:58,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 239.5ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:01:58,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:01:58,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1574. [2021-03-10 15:01:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 2.7285441830896375) internal successors, (4292), 1573 states have internal predecessors, (4292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:58,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 4292 transitions. [2021-03-10 15:01:58,948 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 4292 transitions. Word has length 69 [2021-03-10 15:01:58,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:58,948 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 4292 transitions. [2021-03-10 15:01:58,948 INFO L481 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) [2021-03-10 15:01:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 4292 transitions. [2021-03-10 15:01:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:58,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:58,950 INFO L519 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] [2021-03-10 15:01:59,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 15:01:59,163 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:59,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash -2063810247, now seen corresponding path program 26 times [2021-03-10 15:01:59,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:59,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933688561] [2021-03-10 15:01:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:59,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933688561] [2021-03-10 15:01:59,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085716246] [2021-03-10 15:01:59,233 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 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 [2021-03-10 15:01:59,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:59,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:59,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:01:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:59,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:59,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:59,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310211034] [2021-03-10 15:01:59,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:59,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:59,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:59,372 INFO L87 Difference]: Start difference. First operand 1574 states and 4292 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) [2021-03-10 15:01:59,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:59,656 INFO L93 Difference]: Finished difference Result 3065 states and 8058 transitions. [2021-03-10 15:01:59,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:59,656 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 69 [2021-03-10 15:01:59,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:59,660 INFO L225 Difference]: With dead ends: 3065 [2021-03-10 15:01:59,660 INFO L226 Difference]: Without dead ends: 2795 [2021-03-10 15:01:59,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:01:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-03-10 15:01:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1749. [2021-03-10 15:01:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.7734553775743707) internal successors, (4848), 1748 states have internal predecessors, (4848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:59,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4848 transitions. [2021-03-10 15:01:59,685 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4848 transitions. Word has length 69 [2021-03-10 15:01:59,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:59,685 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4848 transitions. [2021-03-10 15:01:59,685 INFO L481 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) [2021-03-10 15:01:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4848 transitions. [2021-03-10 15:01:59,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:59,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:59,687 INFO L519 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] [2021-03-10 15:01:59,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:59,903 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1404237507, now seen corresponding path program 27 times [2021-03-10 15:01:59,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:59,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022882622] [2021-03-10 15:01:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:59,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022882622] [2021-03-10 15:01:59,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224706328] [2021-03-10 15:01:59,984 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 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 [2021-03-10 15:02:00,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:02:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:00,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:02:00,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:00,122 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:00,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:00,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 15:02:00,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909539984] [2021-03-10 15:02:00,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:02:00,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:00,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:02:00,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:02:00,124 INFO L87 Difference]: Start difference. First operand 1749 states and 4848 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:00,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:00,495 INFO L93 Difference]: Finished difference Result 2438 states and 6466 transitions. [2021-03-10 15:02:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 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 69 [2021-03-10 15:02:00,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:00,498 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 15:02:00,498 INFO L226 Difference]: Without dead ends: 2027 [2021-03-10 15:02:00,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:02:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-03-10 15:02:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1263. [2021-03-10 15:02:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.6814580031695723) internal successors, (3384), 1262 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3384 transitions. [2021-03-10 15:02:00,514 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3384 transitions. Word has length 69 [2021-03-10 15:02:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:00,514 INFO L480 AbstractCegarLoop]: Abstraction has 1263 states and 3384 transitions. [2021-03-10 15:02:00,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:00,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3384 transitions. [2021-03-10 15:02:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:00,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:00,516 INFO L519 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] [2021-03-10 15:02:00,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 15:02:00,716 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash 925994951, now seen corresponding path program 28 times [2021-03-10 15:02:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:00,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328190968] [2021-03-10 15:02:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:00,835 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:00,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328190968] [2021-03-10 15:02:00,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66086005] [2021-03-10 15:02:00,836 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 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 [2021-03-10 15:02:00,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:02:00,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:01,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:01,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-03-10 15:02:01,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412472914] [2021-03-10 15:02:01,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:01,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:01,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:01,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:01,046 INFO L87 Difference]: Start difference. First operand 1263 states and 3384 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 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) [2021-03-10 15:02:01,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:01,320 INFO L93 Difference]: Finished difference Result 2153 states and 5484 transitions. [2021-03-10 15:02:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 15:02:01,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 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 74 [2021-03-10 15:02:01,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:01,323 INFO L225 Difference]: With dead ends: 2153 [2021-03-10 15:02:01,323 INFO L226 Difference]: Without dead ends: 1819 [2021-03-10 15:02:01,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 286.5ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:02:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1819 states. [2021-03-10 15:02:01,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1819 to 1348. [2021-03-10 15:02:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1347 states have (on average 2.6384558277654047) internal successors, (3554), 1347 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3554 transitions. [2021-03-10 15:02:01,343 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3554 transitions. Word has length 74 [2021-03-10 15:02:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:01,343 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 3554 transitions. [2021-03-10 15:02:01,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 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) [2021-03-10 15:02:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3554 transitions. [2021-03-10 15:02:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:01,345 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:01,345 INFO L519 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] [2021-03-10 15:02:01,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 15:02:01,560 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:01,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1444584373, now seen corresponding path program 29 times [2021-03-10 15:02:01,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:01,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694476147] [2021-03-10 15:02:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:01,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694476147] [2021-03-10 15:02:01,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301211908] [2021-03-10 15:02:01,679 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 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 [2021-03-10 15:02:01,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 15:02:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:02:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:01,836 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:01,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:01,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:02:01,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544691820] [2021-03-10 15:02:01,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:02:01,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:01,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:02:01,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:02:01,837 INFO L87 Difference]: Start difference. First operand 1348 states and 3554 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:02,020 INFO L93 Difference]: Finished difference Result 2532 states and 6136 transitions. [2021-03-10 15:02:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:02:02,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-03-10 15:02:02,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:02,023 INFO L225 Difference]: With dead ends: 2532 [2021-03-10 15:02:02,023 INFO L226 Difference]: Without dead ends: 2262 [2021-03-10 15:02:02,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:02:02,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-03-10 15:02:02,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1449. [2021-03-10 15:02:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.653314917127072) internal successors, (3842), 1448 states have internal predecessors, (3842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3842 transitions. [2021-03-10 15:02:02,044 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3842 transitions. Word has length 74 [2021-03-10 15:02:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:02,044 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 3842 transitions. [2021-03-10 15:02:02,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3842 transitions. [2021-03-10 15:02:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:02,046 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:02,046 INFO L519 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] [2021-03-10 15:02:02,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:02,259 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:02,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:02,260 INFO L82 PathProgramCache]: Analyzing trace with hash -161708011, now seen corresponding path program 30 times [2021-03-10 15:02:02,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:02,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431979487] [2021-03-10 15:02:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:02,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431979487] [2021-03-10 15:02:02,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127451226] [2021-03-10 15:02:02,370 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 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 [2021-03-10 15:02:02,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 15:02:02,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:02,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:02:02,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:02,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:02:02,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253853911] [2021-03-10 15:02:02,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:02:02,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:02,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:02:02,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:02:02,547 INFO L87 Difference]: Start difference. First operand 1449 states and 3842 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:02,788 INFO L93 Difference]: Finished difference Result 2517 states and 6206 transitions. [2021-03-10 15:02:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:02:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-03-10 15:02:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:02,796 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:02:02,796 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:02:02,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:02:02,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:02:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1549. [2021-03-10 15:02:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1549 states, 1548 states have (on average 2.6757105943152455) internal successors, (4142), 1548 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 4142 transitions. [2021-03-10 15:02:02,817 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 4142 transitions. Word has length 74 [2021-03-10 15:02:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:02,818 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 4142 transitions. [2021-03-10 15:02:02,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 4142 transitions. [2021-03-10 15:02:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:02,819 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:02,819 INFO L519 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] [2021-03-10 15:02:03,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 15:02:03,028 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:03,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1795803885, now seen corresponding path program 31 times [2021-03-10 15:02:03,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:03,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230203992] [2021-03-10 15:02:03,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:03,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230203992] [2021-03-10 15:02:03,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701831573] [2021-03-10 15:02:03,127 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 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 [2021-03-10 15:02:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:03,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:02:03,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:03,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:03,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:02:03,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126109584] [2021-03-10 15:02:03,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:02:03,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:03,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:02:03,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:02:03,297 INFO L87 Difference]: Start difference. First operand 1549 states and 4142 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:03,555 INFO L93 Difference]: Finished difference Result 2517 states and 6306 transitions. [2021-03-10 15:02:03,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:02:03,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-03-10 15:02:03,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:03,559 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:02:03,559 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:02:03,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:02:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:02:03,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1649. [2021-03-10 15:02:03,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 2.695388349514563) internal successors, (4442), 1648 states have internal predecessors, (4442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:03,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4442 transitions. [2021-03-10 15:02:03,580 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4442 transitions. Word has length 74 [2021-03-10 15:02:03,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:03,580 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4442 transitions. [2021-03-10 15:02:03,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4442 transitions. [2021-03-10 15:02:03,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:03,582 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:03,582 INFO L519 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] [2021-03-10 15:02:03,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:03,785 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:03,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:03,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1474926703, now seen corresponding path program 32 times [2021-03-10 15:02:03,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:03,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825397797] [2021-03-10 15:02:03,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:03,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825397797] [2021-03-10 15:02:03,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063475055] [2021-03-10 15:02:03,887 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 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 [2021-03-10 15:02:03,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:02:03,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:04,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:04,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:02:04,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820468260] [2021-03-10 15:02:04,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:02:04,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:04,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:02:04,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:02:04,032 INFO L87 Difference]: Start difference. First operand 1649 states and 4442 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:04,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:04,334 INFO L93 Difference]: Finished difference Result 2517 states and 6406 transitions. [2021-03-10 15:02:04,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:02:04,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-03-10 15:02:04,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:04,337 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:02:04,337 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:02:04,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:02:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:02:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1749. [2021-03-10 15:02:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 2.7128146453089244) internal successors, (4742), 1748 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:04,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4742 transitions. [2021-03-10 15:02:04,359 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4742 transitions. Word has length 74 [2021-03-10 15:02:04,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:04,359 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4742 transitions. [2021-03-10 15:02:04,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:04,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4742 transitions. [2021-03-10 15:02:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:04,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:04,361 INFO L519 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] [2021-03-10 15:02:04,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 15:02:04,572 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1751253105, now seen corresponding path program 33 times [2021-03-10 15:02:04,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:04,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918587312] [2021-03-10 15:02:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:04,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918587312] [2021-03-10 15:02:04,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783475841] [2021-03-10 15:02:04,670 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 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 [2021-03-10 15:02:04,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 15:02:04,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:04,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:04,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:04,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:04,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:02:04,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669852344] [2021-03-10 15:02:04,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:02:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:02:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:02:04,839 INFO L87 Difference]: Start difference. First operand 1749 states and 4742 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:05,146 INFO L93 Difference]: Finished difference Result 3265 states and 8558 transitions. [2021-03-10 15:02:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 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 74 [2021-03-10 15:02:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:05,150 INFO L225 Difference]: With dead ends: 3265 [2021-03-10 15:02:05,150 INFO L226 Difference]: Without dead ends: 2995 [2021-03-10 15:02:05,150 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:02:05,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-03-10 15:02:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1924. [2021-03-10 15:02:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.7550702028081124) internal successors, (5298), 1923 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5298 transitions. [2021-03-10 15:02:05,177 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5298 transitions. Word has length 74 [2021-03-10 15:02:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:05,177 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5298 transitions. [2021-03-10 15:02:05,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5298 transitions. [2021-03-10 15:02:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:02:05,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:05,179 INFO L519 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] [2021-03-10 15:02:05,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 15:02:05,395 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:05,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1091680365, now seen corresponding path program 34 times [2021-03-10 15:02:05,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:05,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688506872] [2021-03-10 15:02:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:05,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688506872] [2021-03-10 15:02:05,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939126320] [2021-03-10 15:02:05,486 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 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 [2021-03-10 15:02:05,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:05,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:05,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:02:05,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:05,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:05,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 15:02:05,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557102550] [2021-03-10 15:02:05,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:05,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:05,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:05,647 INFO L87 Difference]: Start difference. First operand 1924 states and 5298 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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) [2021-03-10 15:02:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:06,132 INFO L93 Difference]: Finished difference Result 3079 states and 8056 transitions. [2021-03-10 15:02:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:06,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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 74 [2021-03-10 15:02:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:06,135 INFO L225 Difference]: With dead ends: 3079 [2021-03-10 15:02:06,135 INFO L226 Difference]: Without dead ends: 2552 [2021-03-10 15:02:06,136 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 423.9ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-03-10 15:02:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 1934. [2021-03-10 15:02:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.742886704604242) internal successors, (5302), 1933 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5302 transitions. [2021-03-10 15:02:06,158 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5302 transitions. Word has length 74 [2021-03-10 15:02:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:06,158 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5302 transitions. [2021-03-10 15:02:06,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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) [2021-03-10 15:02:06,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5302 transitions. [2021-03-10 15:02:06,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:06,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:06,160 INFO L519 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] [2021-03-10 15:02:06,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-10 15:02:06,361 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -698677072, now seen corresponding path program 35 times [2021-03-10 15:02:06,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:06,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750288318] [2021-03-10 15:02:06,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:06,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750288318] [2021-03-10 15:02:06,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234964716] [2021-03-10 15:02:06,478 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 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 [2021-03-10 15:02:06,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 15:02:06,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:02:06,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:06,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:06,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 15:02:06,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128405989] [2021-03-10 15:02:06,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:06,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:06,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:06,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:06,641 INFO L87 Difference]: Start difference. First operand 1934 states and 5302 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:06,868 INFO L93 Difference]: Finished difference Result 2777 states and 7116 transitions. [2021-03-10 15:02:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 15:02:06,868 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-03-10 15:02:06,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:06,871 INFO L225 Difference]: With dead ends: 2777 [2021-03-10 15:02:06,872 INFO L226 Difference]: Without dead ends: 2507 [2021-03-10 15:02:06,872 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:02:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-03-10 15:02:06,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1934. [2021-03-10 15:02:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.742886704604242) internal successors, (5302), 1933 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:06,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5302 transitions. [2021-03-10 15:02:06,895 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5302 transitions. Word has length 79 [2021-03-10 15:02:06,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:06,895 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5302 transitions. [2021-03-10 15:02:06,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5302 transitions. [2021-03-10 15:02:06,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:06,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:06,897 INFO L519 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] [2021-03-10 15:02:07,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 15:02:07,097 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:07,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:07,098 INFO L82 PathProgramCache]: Analyzing trace with hash 750194734, now seen corresponding path program 36 times [2021-03-10 15:02:07,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:07,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320266502] [2021-03-10 15:02:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:07,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320266502] [2021-03-10 15:02:07,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532498681] [2021-03-10 15:02:07,206 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 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 [2021-03-10 15:02:07,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 15:02:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:07,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:07,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:07,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 15:02:07,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20866619] [2021-03-10 15:02:07,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:07,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:07,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:07,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:07,362 INFO L87 Difference]: Start difference. First operand 1934 states and 5302 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:07,646 INFO L93 Difference]: Finished difference Result 2952 states and 7466 transitions. [2021-03-10 15:02:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:02:07,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-03-10 15:02:07,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:07,650 INFO L225 Difference]: With dead ends: 2952 [2021-03-10 15:02:07,650 INFO L226 Difference]: Without dead ends: 2682 [2021-03-10 15:02:07,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 15:02:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-03-10 15:02:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1934. [2021-03-10 15:02:07,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.742886704604242) internal successors, (5302), 1933 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5302 transitions. [2021-03-10 15:02:07,674 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5302 transitions. Word has length 79 [2021-03-10 15:02:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:07,674 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5302 transitions. [2021-03-10 15:02:07,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5302 transitions. [2021-03-10 15:02:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:07,676 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:07,676 INFO L519 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] [2021-03-10 15:02:07,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:07,877 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash -883901140, now seen corresponding path program 37 times [2021-03-10 15:02:07,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:07,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544844406] [2021-03-10 15:02:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544844406] [2021-03-10 15:02:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48165542] [2021-03-10 15:02:07,975 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 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 [2021-03-10 15:02:08,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:08,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:02:08,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:08,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:08,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 15:02:08,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653855210] [2021-03-10 15:02:08,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:08,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:08,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:08,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:08,134 INFO L87 Difference]: Start difference. First operand 1934 states and 5302 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:08,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:08,419 INFO L93 Difference]: Finished difference Result 2852 states and 7266 transitions. [2021-03-10 15:02:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:08,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-03-10 15:02:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:08,423 INFO L225 Difference]: With dead ends: 2852 [2021-03-10 15:02:08,423 INFO L226 Difference]: Without dead ends: 2582 [2021-03-10 15:02:08,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 15:02:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-03-10 15:02:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1934. [2021-03-10 15:02:08,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.742886704604242) internal successors, (5302), 1933 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5302 transitions. [2021-03-10 15:02:08,446 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5302 transitions. Word has length 79 [2021-03-10 15:02:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:08,446 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5302 transitions. [2021-03-10 15:02:08,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:08,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5302 transitions. [2021-03-10 15:02:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:08,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:08,448 INFO L519 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] [2021-03-10 15:02:08,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 15:02:08,649 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:08,649 INFO L82 PathProgramCache]: Analyzing trace with hash -563023958, now seen corresponding path program 38 times [2021-03-10 15:02:08,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:08,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418634567] [2021-03-10 15:02:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:08,755 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:08,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418634567] [2021-03-10 15:02:08,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962335813] [2021-03-10 15:02:08,756 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 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 [2021-03-10 15:02:08,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:08,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:08,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:08,926 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:08,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:08,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 15:02:08,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208506023] [2021-03-10 15:02:08,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:08,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:08,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:08,927 INFO L87 Difference]: Start difference. First operand 1934 states and 5302 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:09,266 INFO L93 Difference]: Finished difference Result 2752 states and 7066 transitions. [2021-03-10 15:02:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:09,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-03-10 15:02:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:09,269 INFO L225 Difference]: With dead ends: 2752 [2021-03-10 15:02:09,269 INFO L226 Difference]: Without dead ends: 2482 [2021-03-10 15:02:09,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 15:02:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-03-10 15:02:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 1934. [2021-03-10 15:02:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.742886704604242) internal successors, (5302), 1933 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5302 transitions. [2021-03-10 15:02:09,291 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5302 transitions. Word has length 79 [2021-03-10 15:02:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:09,292 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5302 transitions. [2021-03-10 15:02:09,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5302 transitions. [2021-03-10 15:02:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:09,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:09,294 INFO L519 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] [2021-03-10 15:02:09,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:09,494 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -839350360, now seen corresponding path program 39 times [2021-03-10 15:02:09,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:09,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37344856] [2021-03-10 15:02:09,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:09,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37344856] [2021-03-10 15:02:09,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7448374] [2021-03-10 15:02:09,586 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 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 [2021-03-10 15:02:09,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 15:02:09,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:09,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:09,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:09,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 15:02:09,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062171242] [2021-03-10 15:02:09,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:02:09,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:02:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:02:09,739 INFO L87 Difference]: Start difference. First operand 1934 states and 5302 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:10,095 INFO L93 Difference]: Finished difference Result 3425 states and 9008 transitions. [2021-03-10 15:02:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 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 79 [2021-03-10 15:02:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:10,099 INFO L225 Difference]: With dead ends: 3425 [2021-03-10 15:02:10,100 INFO L226 Difference]: Without dead ends: 3155 [2021-03-10 15:02:10,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 15:02:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2021-03-10 15:02:10,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2059. [2021-03-10 15:02:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 2.7687074829931975) internal successors, (5698), 2058 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:10,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 5698 transitions. [2021-03-10 15:02:10,128 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 5698 transitions. Word has length 79 [2021-03-10 15:02:10,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:10,128 INFO L480 AbstractCegarLoop]: Abstraction has 2059 states and 5698 transitions. [2021-03-10 15:02:10,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:10,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 5698 transitions. [2021-03-10 15:02:10,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:02:10,130 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:10,130 INFO L519 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] [2021-03-10 15:02:10,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:10,343 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:10,343 INFO L82 PathProgramCache]: Analyzing trace with hash -179777620, now seen corresponding path program 40 times [2021-03-10 15:02:10,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:10,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517428772] [2021-03-10 15:02:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:10,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517428772] [2021-03-10 15:02:10,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486855693] [2021-03-10 15:02:10,440 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 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 [2021-03-10 15:02:10,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:02:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:10,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:10,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-03-10 15:02:10,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345073089] [2021-03-10 15:02:10,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:10,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:10,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:10,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:10,594 INFO L87 Difference]: Start difference. First operand 2059 states and 5698 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 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) [2021-03-10 15:02:11,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:11,134 INFO L93 Difference]: Finished difference Result 3179 states and 8356 transitions. [2021-03-10 15:02:11,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:11,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 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 79 [2021-03-10 15:02:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:11,137 INFO L225 Difference]: With dead ends: 3179 [2021-03-10 15:02:11,138 INFO L226 Difference]: Without dead ends: 2652 [2021-03-10 15:02:11,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 486.0ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 15:02:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652 states. [2021-03-10 15:02:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2652 to 1473. [2021-03-10 15:02:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.672554347826087) internal successors, (3934), 1472 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 3934 transitions. [2021-03-10 15:02:11,157 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 3934 transitions. Word has length 79 [2021-03-10 15:02:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:11,157 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 3934 transitions. [2021-03-10 15:02:11,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 18 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) [2021-03-10 15:02:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 3934 transitions. [2021-03-10 15:02:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:11,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:11,159 INFO L519 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] [2021-03-10 15:02:11,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-03-10 15:02:11,375 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -27827016, now seen corresponding path program 41 times [2021-03-10 15:02:11,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:11,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089638365] [2021-03-10 15:02:11,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:11,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089638365] [2021-03-10 15:02:11,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468970501] [2021-03-10 15:02:11,503 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 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 [2021-03-10 15:02:11,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 15:02:11,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:11,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:11,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:11,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-03-10 15:02:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817629966] [2021-03-10 15:02:11,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:11,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:11,703 INFO L87 Difference]: Start difference. First operand 1473 states and 3934 transitions. Second operand has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 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) [2021-03-10 15:02:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:11,990 INFO L93 Difference]: Finished difference Result 2413 states and 6134 transitions. [2021-03-10 15:02:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:02:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 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 84 [2021-03-10 15:02:11,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:11,993 INFO L225 Difference]: With dead ends: 2413 [2021-03-10 15:02:11,993 INFO L226 Difference]: Without dead ends: 2079 [2021-03-10 15:02:11,993 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 15:02:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-03-10 15:02:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1558. [2021-03-10 15:02:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1558 states, 1557 states have (on average 2.6358381502890174) internal successors, (4104), 1557 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1558 states to 1558 states and 4104 transitions. [2021-03-10 15:02:12,012 INFO L78 Accepts]: Start accepts. Automaton has 1558 states and 4104 transitions. Word has length 84 [2021-03-10 15:02:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:12,012 INFO L480 AbstractCegarLoop]: Abstraction has 1558 states and 4104 transitions. [2021-03-10 15:02:12,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.857142857142857) internal successors, (102), 21 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) [2021-03-10 15:02:12,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1558 states and 4104 transitions. [2021-03-10 15:02:12,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:12,013 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:12,013 INFO L519 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] [2021-03-10 15:02:12,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:12,214 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:12,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1907564762, now seen corresponding path program 42 times [2021-03-10 15:02:12,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:12,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185162370] [2021-03-10 15:02:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:12,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185162370] [2021-03-10 15:02:12,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195160512] [2021-03-10 15:02:12,342 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 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 [2021-03-10 15:02:12,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 15:02:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:12,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:12,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:12,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:12,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470175257] [2021-03-10 15:02:12,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:12,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:12,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:12,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:12,526 INFO L87 Difference]: Start difference. First operand 1558 states and 4104 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:12,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:12,739 INFO L93 Difference]: Finished difference Result 2892 states and 6986 transitions. [2021-03-10 15:02:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:02:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:12,743 INFO L225 Difference]: With dead ends: 2892 [2021-03-10 15:02:12,743 INFO L226 Difference]: Without dead ends: 2622 [2021-03-10 15:02:12,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:02:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2622 states. [2021-03-10 15:02:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2622 to 1659. [2021-03-10 15:02:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1659 states, 1658 states have (on average 2.6489746682750304) internal successors, (4392), 1658 states have internal predecessors, (4392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1659 states to 1659 states and 4392 transitions. [2021-03-10 15:02:12,763 INFO L78 Accepts]: Start accepts. Automaton has 1659 states and 4392 transitions. Word has length 84 [2021-03-10 15:02:12,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:12,764 INFO L480 AbstractCegarLoop]: Abstraction has 1659 states and 4392 transitions. [2021-03-10 15:02:12,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:12,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1659 states and 4392 transitions. [2021-03-10 15:02:12,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:12,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:12,765 INFO L519 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] [2021-03-10 15:02:12,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 15:02:12,982 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:12,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1004196742, now seen corresponding path program 43 times [2021-03-10 15:02:12,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:12,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032318544] [2021-03-10 15:02:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032318544] [2021-03-10 15:02:13,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615645760] [2021-03-10 15:02:13,103 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 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 [2021-03-10 15:02:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:13,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:02:13,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:13,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:13,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135687497] [2021-03-10 15:02:13,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:13,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:13,286 INFO L87 Difference]: Start difference. First operand 1659 states and 4392 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:13,539 INFO L93 Difference]: Finished difference Result 2877 states and 7056 transitions. [2021-03-10 15:02:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:02:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:13,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:13,543 INFO L225 Difference]: With dead ends: 2877 [2021-03-10 15:02:13,543 INFO L226 Difference]: Without dead ends: 2607 [2021-03-10 15:02:13,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 261.9ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:02:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-03-10 15:02:13,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1759. [2021-03-10 15:02:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1759 states, 1758 states have (on average 2.6689419795221845) internal successors, (4692), 1758 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1759 states to 1759 states and 4692 transitions. [2021-03-10 15:02:13,565 INFO L78 Accepts]: Start accepts. Automaton has 1759 states and 4692 transitions. Word has length 84 [2021-03-10 15:02:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:13,565 INFO L480 AbstractCegarLoop]: Abstraction has 1759 states and 4692 transitions. [2021-03-10 15:02:13,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1759 states and 4692 transitions. [2021-03-10 15:02:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:13,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:13,567 INFO L519 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] [2021-03-10 15:02:13,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:13,768 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:13,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:13,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1841898748, now seen corresponding path program 44 times [2021-03-10 15:02:13,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:13,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778763698] [2021-03-10 15:02:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:13,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778763698] [2021-03-10 15:02:13,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055567166] [2021-03-10 15:02:13,884 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 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 [2021-03-10 15:02:13,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:13,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:13,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:14,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:14,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:14,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220335347] [2021-03-10 15:02:14,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:14,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:14,055 INFO L87 Difference]: Start difference. First operand 1759 states and 4692 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:14,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:14,338 INFO L93 Difference]: Finished difference Result 2877 states and 7156 transitions. [2021-03-10 15:02:14,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:02:14,339 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:14,341 INFO L225 Difference]: With dead ends: 2877 [2021-03-10 15:02:14,341 INFO L226 Difference]: Without dead ends: 2607 [2021-03-10 15:02:14,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:02:14,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-03-10 15:02:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1859. [2021-03-10 15:02:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 2.6867599569429492) internal successors, (4992), 1858 states have internal predecessors, (4992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 4992 transitions. [2021-03-10 15:02:14,363 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 4992 transitions. Word has length 84 [2021-03-10 15:02:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:14,363 INFO L480 AbstractCegarLoop]: Abstraction has 1859 states and 4992 transitions. [2021-03-10 15:02:14,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:14,363 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 4992 transitions. [2021-03-10 15:02:14,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:14,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:14,365 INFO L519 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] [2021-03-10 15:02:14,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 15:02:14,580 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash 818972674, now seen corresponding path program 45 times [2021-03-10 15:02:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753085707] [2021-03-10 15:02:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:14,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753085707] [2021-03-10 15:02:14,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747539305] [2021-03-10 15:02:14,693 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 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 [2021-03-10 15:02:14,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 15:02:14,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:02:14,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:14,866 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:14,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:14,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:14,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027813049] [2021-03-10 15:02:14,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:14,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:14,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:14,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:14,868 INFO L87 Difference]: Start difference. First operand 1859 states and 4992 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:15,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:15,189 INFO L93 Difference]: Finished difference Result 2877 states and 7256 transitions. [2021-03-10 15:02:15,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:15,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:15,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:15,193 INFO L225 Difference]: With dead ends: 2877 [2021-03-10 15:02:15,193 INFO L226 Difference]: Without dead ends: 2607 [2021-03-10 15:02:15,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 15:02:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2607 states. [2021-03-10 15:02:15,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2607 to 1959. [2021-03-10 15:02:15,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1958 states have (on average 2.702757916241062) internal successors, (5292), 1958 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 5292 transitions. [2021-03-10 15:02:15,218 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 5292 transitions. Word has length 84 [2021-03-10 15:02:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:15,218 INFO L480 AbstractCegarLoop]: Abstraction has 1959 states and 5292 transitions. [2021-03-10 15:02:15,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 5292 transitions. [2021-03-10 15:02:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:15,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:15,220 INFO L519 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] [2021-03-10 15:02:15,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-03-10 15:02:15,435 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1139849856, now seen corresponding path program 46 times [2021-03-10 15:02:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:15,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488607936] [2021-03-10 15:02:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:15,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488607936] [2021-03-10 15:02:15,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107744633] [2021-03-10 15:02:15,542 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 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 [2021-03-10 15:02:15,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:15,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:02:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:15,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815866930] [2021-03-10 15:02:15,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:15,711 INFO L87 Difference]: Start difference. First operand 1959 states and 5292 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:16,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:16,074 INFO L93 Difference]: Finished difference Result 2907 states and 7431 transitions. [2021-03-10 15:02:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:16,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:16,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:16,078 INFO L225 Difference]: With dead ends: 2907 [2021-03-10 15:02:16,078 INFO L226 Difference]: Without dead ends: 2637 [2021-03-10 15:02:16,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 15:02:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-03-10 15:02:16,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2059. [2021-03-10 15:02:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 2058 states have (on average 2.7220602526724975) internal successors, (5602), 2058 states have internal predecessors, (5602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:16,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 5602 transitions. [2021-03-10 15:02:16,104 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 5602 transitions. Word has length 84 [2021-03-10 15:02:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:16,105 INFO L480 AbstractCegarLoop]: Abstraction has 2059 states and 5602 transitions. [2021-03-10 15:02:16,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 5602 transitions. [2021-03-10 15:02:16,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:16,107 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:16,107 INFO L519 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] [2021-03-10 15:02:16,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 15:02:16,308 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:16,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:16,308 INFO L82 PathProgramCache]: Analyzing trace with hash 863523454, now seen corresponding path program 47 times [2021-03-10 15:02:16,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:16,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121822533] [2021-03-10 15:02:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121822533] [2021-03-10 15:02:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399856536] [2021-03-10 15:02:16,427 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 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 [2021-03-10 15:02:16,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 15:02:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:02:16,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:16,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:16,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 15:02:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141059022] [2021-03-10 15:02:16,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:02:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:16,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:02:16,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:02:16,626 INFO L87 Difference]: Start difference. First operand 2059 states and 5602 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:17,022 INFO L93 Difference]: Finished difference Result 3941 states and 10362 transitions. [2021-03-10 15:02:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 15:02:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 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 84 [2021-03-10 15:02:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:17,027 INFO L225 Difference]: With dead ends: 3941 [2021-03-10 15:02:17,027 INFO L226 Difference]: Without dead ends: 3460 [2021-03-10 15:02:17,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=516, Invalid=1376, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2021-03-10 15:02:17,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 2234. [2021-03-10 15:02:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.7532467532467533) internal successors, (6148), 2233 states have internal predecessors, (6148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 6148 transitions. [2021-03-10 15:02:17,072 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 6148 transitions. Word has length 84 [2021-03-10 15:02:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:17,072 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 6148 transitions. [2021-03-10 15:02:17,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 18 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 6148 transitions. [2021-03-10 15:02:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-03-10 15:02:17,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:17,075 INFO L519 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] [2021-03-10 15:02:17,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 15:02:17,291 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:17,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:17,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1523096194, now seen corresponding path program 48 times [2021-03-10 15:02:17,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:17,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143290768] [2021-03-10 15:02:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:17,393 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143290768] [2021-03-10 15:02:17,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409059031] [2021-03-10 15:02:17,393 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 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 [2021-03-10 15:02:17,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 15:02:17,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:17,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:17,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:17,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:17,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-03-10 15:02:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096514032] [2021-03-10 15:02:17,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:17,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:17,566 INFO L87 Difference]: Start difference. First operand 2234 states and 6148 transitions. Second operand has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 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) [2021-03-10 15:02:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:18,078 INFO L93 Difference]: Finished difference Result 3359 states and 8766 transitions. [2021-03-10 15:02:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 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 84 [2021-03-10 15:02:18,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:18,081 INFO L225 Difference]: With dead ends: 3359 [2021-03-10 15:02:18,081 INFO L226 Difference]: Without dead ends: 2832 [2021-03-10 15:02:18,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=532, Invalid=1724, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 15:02:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-03-10 15:02:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1684. [2021-03-10 15:02:18,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1684 states, 1683 states have (on average 2.669043374925728) internal successors, (4492), 1683 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1684 states to 1684 states and 4492 transitions. [2021-03-10 15:02:18,101 INFO L78 Accepts]: Start accepts. Automaton has 1684 states and 4492 transitions. Word has length 84 [2021-03-10 15:02:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:18,102 INFO L480 AbstractCegarLoop]: Abstraction has 1684 states and 4492 transitions. [2021-03-10 15:02:18,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.578947368421052) internal successors, (87), 19 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) [2021-03-10 15:02:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1684 states and 4492 transitions. [2021-03-10 15:02:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:18,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:18,103 INFO L519 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] [2021-03-10 15:02:18,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:18,318 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash 909217377, now seen corresponding path program 49 times [2021-03-10 15:02:18,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:18,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441506244] [2021-03-10 15:02:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:18,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441506244] [2021-03-10 15:02:18,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507812606] [2021-03-10 15:02:18,448 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 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 [2021-03-10 15:02:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:18,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:18,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:18,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:18,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:18,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376006605] [2021-03-10 15:02:18,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:18,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:18,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:18,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:18,633 INFO L87 Difference]: Start difference. First operand 1684 states and 4492 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:18,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:18,899 INFO L93 Difference]: Finished difference Result 2677 states and 6656 transitions. [2021-03-10 15:02:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:02:18,899 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:18,902 INFO L225 Difference]: With dead ends: 2677 [2021-03-10 15:02:18,902 INFO L226 Difference]: Without dead ends: 2407 [2021-03-10 15:02:18,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=334, Invalid=998, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:02:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-03-10 15:02:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1734. [2021-03-10 15:02:18,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1733 states have (on average 2.678592036930179) internal successors, (4642), 1733 states have internal predecessors, (4642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 4642 transitions. [2021-03-10 15:02:18,920 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 4642 transitions. Word has length 89 [2021-03-10 15:02:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:18,920 INFO L480 AbstractCegarLoop]: Abstraction has 1734 states and 4642 transitions. [2021-03-10 15:02:18,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 4642 transitions. [2021-03-10 15:02:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:18,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:18,922 INFO L519 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] [2021-03-10 15:02:19,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 15:02:19,137 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:19,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:19,137 INFO L82 PathProgramCache]: Analyzing trace with hash -754921377, now seen corresponding path program 50 times [2021-03-10 15:02:19,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:19,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72409795] [2021-03-10 15:02:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72409795] [2021-03-10 15:02:19,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083423759] [2021-03-10 15:02:19,260 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 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 [2021-03-10 15:02:19,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:19,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:19,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:19,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:19,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:19,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716970281] [2021-03-10 15:02:19,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:19,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:19,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:19,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:19,430 INFO L87 Difference]: Start difference. First operand 1734 states and 4642 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:19,733 INFO L93 Difference]: Finished difference Result 3002 states and 7406 transitions. [2021-03-10 15:02:19,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:19,736 INFO L225 Difference]: With dead ends: 3002 [2021-03-10 15:02:19,736 INFO L226 Difference]: Without dead ends: 2732 [2021-03-10 15:02:19,737 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=384, Invalid=1176, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 15:02:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-03-10 15:02:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1834. [2021-03-10 15:02:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1834 states, 1833 states have (on average 2.696126568466994) internal successors, (4942), 1833 states have internal predecessors, (4942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1834 states to 1834 states and 4942 transitions. [2021-03-10 15:02:19,757 INFO L78 Accepts]: Start accepts. Automaton has 1834 states and 4942 transitions. Word has length 89 [2021-03-10 15:02:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:19,757 INFO L480 AbstractCegarLoop]: Abstraction has 1834 states and 4942 transitions. [2021-03-10 15:02:19,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:19,757 INFO L276 IsEmpty]: Start isEmpty. Operand 1834 states and 4942 transitions. [2021-03-10 15:02:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:19,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:19,759 INFO L519 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] [2021-03-10 15:02:19,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:19,963 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:19,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:19,963 INFO L82 PathProgramCache]: Analyzing trace with hash 693950429, now seen corresponding path program 51 times [2021-03-10 15:02:19,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:19,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907144737] [2021-03-10 15:02:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:20,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907144737] [2021-03-10 15:02:20,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995289581] [2021-03-10 15:02:20,083 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 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 [2021-03-10 15:02:20,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 15:02:20,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:20,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 15:02:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:20,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:20,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:20,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948758930] [2021-03-10 15:02:20,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:20,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:20,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:20,263 INFO L87 Difference]: Start difference. First operand 1834 states and 4942 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:20,621 INFO L93 Difference]: Finished difference Result 3002 states and 7506 transitions. [2021-03-10 15:02:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:20,625 INFO L225 Difference]: With dead ends: 3002 [2021-03-10 15:02:20,625 INFO L226 Difference]: Without dead ends: 2732 [2021-03-10 15:02:20,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 343.2ms TimeCoverageRelationStatistics Valid=425, Invalid=1297, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 15:02:20,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-03-10 15:02:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 1934. [2021-03-10 15:02:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 2.711846870150026) internal successors, (5242), 1933 states have internal predecessors, (5242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 5242 transitions. [2021-03-10 15:02:20,649 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 5242 transitions. Word has length 89 [2021-03-10 15:02:20,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:20,649 INFO L480 AbstractCegarLoop]: Abstraction has 1934 states and 5242 transitions. [2021-03-10 15:02:20,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 5242 transitions. [2021-03-10 15:02:20,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:20,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:20,651 INFO L519 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] [2021-03-10 15:02:20,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:20,851 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -940145445, now seen corresponding path program 52 times [2021-03-10 15:02:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:20,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290673889] [2021-03-10 15:02:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:20,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290673889] [2021-03-10 15:02:20,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48487244] [2021-03-10 15:02:20,973 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 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 [2021-03-10 15:02:21,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:21,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:21,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:21,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:21,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:21,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:21,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322675846] [2021-03-10 15:02:21,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:21,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:21,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:21,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:21,166 INFO L87 Difference]: Start difference. First operand 1934 states and 5242 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:21,519 INFO L93 Difference]: Finished difference Result 3002 states and 7606 transitions. [2021-03-10 15:02:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:21,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:21,523 INFO L225 Difference]: With dead ends: 3002 [2021-03-10 15:02:21,523 INFO L226 Difference]: Without dead ends: 2732 [2021-03-10 15:02:21,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=482, Invalid=1410, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2021-03-10 15:02:21,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2034. [2021-03-10 15:02:21,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.7260206591244467) internal successors, (5542), 2033 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:21,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5542 transitions. [2021-03-10 15:02:21,548 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5542 transitions. Word has length 89 [2021-03-10 15:02:21,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:21,548 INFO L480 AbstractCegarLoop]: Abstraction has 2034 states and 5542 transitions. [2021-03-10 15:02:21,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:21,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5542 transitions. [2021-03-10 15:02:21,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:21,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:21,550 INFO L519 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] [2021-03-10 15:02:21,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:21,755 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -619268263, now seen corresponding path program 53 times [2021-03-10 15:02:21,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:21,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056478886] [2021-03-10 15:02:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056478886] [2021-03-10 15:02:21,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638008147] [2021-03-10 15:02:21,868 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 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 [2021-03-10 15:02:21,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 15:02:21,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:21,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:22,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:22,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:22,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929815548] [2021-03-10 15:02:22,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:22,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:22,056 INFO L87 Difference]: Start difference. First operand 2034 states and 5542 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:22,450 INFO L93 Difference]: Finished difference Result 3032 states and 7781 transitions. [2021-03-10 15:02:22,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:22,454 INFO L225 Difference]: With dead ends: 3032 [2021-03-10 15:02:22,454 INFO L226 Difference]: Without dead ends: 2762 [2021-03-10 15:02:22,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 360.8ms TimeCoverageRelationStatistics Valid=555, Invalid=1515, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 15:02:22,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2021-03-10 15:02:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 2134. [2021-03-10 15:02:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2134 states, 2133 states have (on average 2.743553680262541) internal successors, (5852), 2133 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2134 states to 2134 states and 5852 transitions. [2021-03-10 15:02:22,480 INFO L78 Accepts]: Start accepts. Automaton has 2134 states and 5852 transitions. Word has length 89 [2021-03-10 15:02:22,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:22,480 INFO L480 AbstractCegarLoop]: Abstraction has 2134 states and 5852 transitions. [2021-03-10 15:02:22,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2134 states and 5852 transitions. [2021-03-10 15:02:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:22,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:22,482 INFO L519 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] [2021-03-10 15:02:22,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:22,687 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:22,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:22,687 INFO L82 PathProgramCache]: Analyzing trace with hash -895594665, now seen corresponding path program 54 times [2021-03-10 15:02:22,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:22,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534079795] [2021-03-10 15:02:22,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534079795] [2021-03-10 15:02:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595168487] [2021-03-10 15:02:22,798 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 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 [2021-03-10 15:02:22,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 15:02:22,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:22,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:22,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:22,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689412788] [2021-03-10 15:02:22,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:22,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:22,971 INFO L87 Difference]: Start difference. First operand 2134 states and 5852 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:23,443 INFO L93 Difference]: Finished difference Result 4041 states and 10662 transitions. [2021-03-10 15:02:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 15:02:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:23,448 INFO L225 Difference]: With dead ends: 4041 [2021-03-10 15:02:23,448 INFO L226 Difference]: Without dead ends: 3560 [2021-03-10 15:02:23,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:02:23,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3560 states. [2021-03-10 15:02:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3560 to 2309. [2021-03-10 15:02:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 2.7720970537261698) internal successors, (6398), 2308 states have internal predecessors, (6398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 6398 transitions. [2021-03-10 15:02:23,475 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 6398 transitions. Word has length 89 [2021-03-10 15:02:23,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:23,475 INFO L480 AbstractCegarLoop]: Abstraction has 2309 states and 6398 transitions. [2021-03-10 15:02:23,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 6398 transitions. [2021-03-10 15:02:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-03-10 15:02:23,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:23,477 INFO L519 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] [2021-03-10 15:02:23,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 15:02:23,682 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash -236021925, now seen corresponding path program 55 times [2021-03-10 15:02:23,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:23,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324176666] [2021-03-10 15:02:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:23,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324176666] [2021-03-10 15:02:23,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110792499] [2021-03-10 15:02:23,788 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 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 [2021-03-10 15:02:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:02:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:23,954 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:23,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:23,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 15:02:23,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669527377] [2021-03-10 15:02:23,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:23,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:23,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:23,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:23,955 INFO L87 Difference]: Start difference. First operand 2309 states and 6398 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:24,479 INFO L93 Difference]: Finished difference Result 3098 states and 8216 transitions. [2021-03-10 15:02:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:24,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 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 89 [2021-03-10 15:02:24,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:24,482 INFO L225 Difference]: With dead ends: 3098 [2021-03-10 15:02:24,482 INFO L226 Difference]: Without dead ends: 2687 [2021-03-10 15:02:24,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:02:24,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2687 states. [2021-03-10 15:02:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2687 to 2259. [2021-03-10 15:02:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2258 states have (on average 2.7688219663418954) internal successors, (6252), 2258 states have internal predecessors, (6252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 6252 transitions. [2021-03-10 15:02:24,507 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 6252 transitions. Word has length 89 [2021-03-10 15:02:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:24,507 INFO L480 AbstractCegarLoop]: Abstraction has 2259 states and 6252 transitions. [2021-03-10 15:02:24,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 19 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 6252 transitions. [2021-03-10 15:02:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:24,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:24,509 INFO L519 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] [2021-03-10 15:02:24,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:24,709 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1787854953, now seen corresponding path program 56 times [2021-03-10 15:02:24,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:24,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490391164] [2021-03-10 15:02:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:24,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490391164] [2021-03-10 15:02:24,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461075283] [2021-03-10 15:02:24,854 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 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 [2021-03-10 15:02:24,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:24,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:25,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:25,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-03-10 15:02:25,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826045539] [2021-03-10 15:02:25,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:25,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:25,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:25,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:25,083 INFO L87 Difference]: Start difference. First operand 2259 states and 6252 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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) [2021-03-10 15:02:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:25,425 INFO L93 Difference]: Finished difference Result 3249 states and 8552 transitions. [2021-03-10 15:02:25,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 15:02:25,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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 94 [2021-03-10 15:02:25,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:25,429 INFO L225 Difference]: With dead ends: 3249 [2021-03-10 15:02:25,429 INFO L226 Difference]: Without dead ends: 2915 [2021-03-10 15:02:25,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 15:02:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2915 states. [2021-03-10 15:02:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2915 to 2344. [2021-03-10 15:02:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 2343 states have (on average 2.740930431071276) internal successors, (6422), 2343 states have internal predecessors, (6422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 6422 transitions. [2021-03-10 15:02:25,455 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 6422 transitions. Word has length 94 [2021-03-10 15:02:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:25,456 INFO L480 AbstractCegarLoop]: Abstraction has 2344 states and 6422 transitions. [2021-03-10 15:02:25,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 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) [2021-03-10 15:02:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 6422 transitions. [2021-03-10 15:02:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:25,458 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:25,458 INFO L519 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] [2021-03-10 15:02:25,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 15:02:25,658 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:25,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1136281943, now seen corresponding path program 57 times [2021-03-10 15:02:25,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:25,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780968467] [2021-03-10 15:02:25,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:25,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780968467] [2021-03-10 15:02:25,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833789418] [2021-03-10 15:02:25,809 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 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 [2021-03-10 15:02:25,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 15:02:25,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:25,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:25,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:25,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:25,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:25,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705604258] [2021-03-10 15:02:25,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:25,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:25,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:25,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:25,997 INFO L87 Difference]: Start difference. First operand 2344 states and 6422 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:26,261 INFO L93 Difference]: Finished difference Result 3742 states and 9346 transitions. [2021-03-10 15:02:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 15:02:26,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:26,266 INFO L225 Difference]: With dead ends: 3742 [2021-03-10 15:02:26,266 INFO L226 Difference]: Without dead ends: 3472 [2021-03-10 15:02:26,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 15:02:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2021-03-10 15:02:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2359. [2021-03-10 15:02:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:26,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:26,296 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:26,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:26,296 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:26,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:26,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:26,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:26,299 INFO L519 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] [2021-03-10 15:02:26,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:26,499 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash -181779017, now seen corresponding path program 58 times [2021-03-10 15:02:26,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:26,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885213857] [2021-03-10 15:02:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885213857] [2021-03-10 15:02:26,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545558588] [2021-03-10 15:02:26,662 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 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 [2021-03-10 15:02:26,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:26,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:26,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:26,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:26,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:26,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:26,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494881092] [2021-03-10 15:02:26,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:26,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:26,846 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:27,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:27,135 INFO L93 Difference]: Finished difference Result 3627 states and 9116 transitions. [2021-03-10 15:02:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:02:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:27,140 INFO L225 Difference]: With dead ends: 3627 [2021-03-10 15:02:27,140 INFO L226 Difference]: Without dead ends: 3357 [2021-03-10 15:02:27,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 15:02:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-03-10 15:02:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2359. [2021-03-10 15:02:27,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:27,166 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:27,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:27,166 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:27,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:27,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:27,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:27,168 INFO L519 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] [2021-03-10 15:02:27,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:27,369 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:27,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:27,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1845917771, now seen corresponding path program 59 times [2021-03-10 15:02:27,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:27,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389680629] [2021-03-10 15:02:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389680629] [2021-03-10 15:02:27,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347867367] [2021-03-10 15:02:27,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 15:02:27,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 15:02:27,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:27,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:27,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:27,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:27,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052535583] [2021-03-10 15:02:27,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:27,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:27,670 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:28,016 INFO L93 Difference]: Finished difference Result 3527 states and 8916 transitions. [2021-03-10 15:02:28,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:28,016 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:28,020 INFO L225 Difference]: With dead ends: 3527 [2021-03-10 15:02:28,020 INFO L226 Difference]: Without dead ends: 3257 [2021-03-10 15:02:28,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 15:02:28,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3257 states. [2021-03-10 15:02:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3257 to 2359. [2021-03-10 15:02:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:28,045 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:28,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:28,045 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:28,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:28,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:28,047 INFO L519 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] [2021-03-10 15:02:28,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:28,248 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -397045965, now seen corresponding path program 60 times [2021-03-10 15:02:28,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:28,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524602647] [2021-03-10 15:02:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:28,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524602647] [2021-03-10 15:02:28,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641488634] [2021-03-10 15:02:28,375 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 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 [2021-03-10 15:02:28,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 15:02:28,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:28,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:28,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:28,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:28,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:28,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183910269] [2021-03-10 15:02:28,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:28,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:28,546 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:28,921 INFO L93 Difference]: Finished difference Result 3427 states and 8716 transitions. [2021-03-10 15:02:28,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:28,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:28,925 INFO L225 Difference]: With dead ends: 3427 [2021-03-10 15:02:28,926 INFO L226 Difference]: Without dead ends: 3157 [2021-03-10 15:02:28,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 15:02:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-03-10 15:02:28,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2359. [2021-03-10 15:02:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:28,956 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:28,956 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:28,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:28,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:28,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:28,959 INFO L519 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] [2021-03-10 15:02:29,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:29,159 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:29,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:29,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2031141839, now seen corresponding path program 61 times [2021-03-10 15:02:29,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:29,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483881619] [2021-03-10 15:02:29,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:29,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483881619] [2021-03-10 15:02:29,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983242245] [2021-03-10 15:02:29,283 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 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 [2021-03-10 15:02:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:29,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:29,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:29,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:29,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924813250] [2021-03-10 15:02:29,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:29,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:29,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:29,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:29,442 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:29,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:29,850 INFO L93 Difference]: Finished difference Result 3327 states and 8516 transitions. [2021-03-10 15:02:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:29,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:29,854 INFO L225 Difference]: With dead ends: 3327 [2021-03-10 15:02:29,854 INFO L226 Difference]: Without dead ends: 3057 [2021-03-10 15:02:29,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:29,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3057 states. [2021-03-10 15:02:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3057 to 2359. [2021-03-10 15:02:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:29,886 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:29,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:29,886 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:29,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:29,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:29,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:29,888 INFO L519 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] [2021-03-10 15:02:30,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-03-10 15:02:30,089 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:30,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:30,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1710264657, now seen corresponding path program 62 times [2021-03-10 15:02:30,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:30,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154346882] [2021-03-10 15:02:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154346882] [2021-03-10 15:02:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574706880] [2021-03-10 15:02:30,203 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 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 [2021-03-10 15:02:30,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:30,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:30,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:30,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:30,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409863415] [2021-03-10 15:02:30,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:30,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:30,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:30,379 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:30,817 INFO L93 Difference]: Finished difference Result 3227 states and 8316 transitions. [2021-03-10 15:02:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:30,817 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:30,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:30,821 INFO L225 Difference]: With dead ends: 3227 [2021-03-10 15:02:30,823 INFO L226 Difference]: Without dead ends: 2957 [2021-03-10 15:02:30,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 15:02:30,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2957 states. [2021-03-10 15:02:30,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2957 to 2359. [2021-03-10 15:02:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 2358 states have (on average 2.736217133163698) internal successors, (6452), 2358 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 6452 transitions. [2021-03-10 15:02:30,850 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 6452 transitions. Word has length 94 [2021-03-10 15:02:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:30,850 INFO L480 AbstractCegarLoop]: Abstraction has 2359 states and 6452 transitions. [2021-03-10 15:02:30,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:30,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 6452 transitions. [2021-03-10 15:02:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:30,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:30,852 INFO L519 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] [2021-03-10 15:02:31,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:31,053 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:31,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1986591059, now seen corresponding path program 63 times [2021-03-10 15:02:31,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:31,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971224496] [2021-03-10 15:02:31,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:31,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971224496] [2021-03-10 15:02:31,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398324297] [2021-03-10 15:02:31,178 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 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 [2021-03-10 15:02:31,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 15:02:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:31,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:31,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-03-10 15:02:31,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222399183] [2021-03-10 15:02:31,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 15:02:31,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:31,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 15:02:31,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:02:31,361 INFO L87 Difference]: Start difference. First operand 2359 states and 6452 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:31,859 INFO L93 Difference]: Finished difference Result 4181 states and 11012 transitions. [2021-03-10 15:02:31,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 15:02:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:31,865 INFO L225 Difference]: With dead ends: 4181 [2021-03-10 15:02:31,865 INFO L226 Difference]: Without dead ends: 3700 [2021-03-10 15:02:31,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=653, Invalid=1699, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:02:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3700 states. [2021-03-10 15:02:31,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3700 to 2424. [2021-03-10 15:02:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.7643417251341313) internal successors, (6698), 2423 states have internal predecessors, (6698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:31,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6698 transitions. [2021-03-10 15:02:31,896 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6698 transitions. Word has length 94 [2021-03-10 15:02:31,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:31,896 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6698 transitions. [2021-03-10 15:02:31,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:31,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6698 transitions. [2021-03-10 15:02:31,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-03-10 15:02:31,898 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:31,898 INFO L519 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] [2021-03-10 15:02:32,098 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:32,099 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:32,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1327018319, now seen corresponding path program 64 times [2021-03-10 15:02:32,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:32,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161969168] [2021-03-10 15:02:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:32,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161969168] [2021-03-10 15:02:32,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647580971] [2021-03-10 15:02:32,232 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 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 [2021-03-10 15:02:32,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjunts are in the unsatisfiable core [2021-03-10 15:02:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:32,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:32,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-03-10 15:02:32,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179203709] [2021-03-10 15:02:32,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 15:02:32,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:32,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 15:02:32,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-03-10 15:02:32,408 INFO L87 Difference]: Start difference. First operand 2424 states and 6698 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:33,016 INFO L93 Difference]: Finished difference Result 3263 states and 8616 transitions. [2021-03-10 15:02:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:02:33,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 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 94 [2021-03-10 15:02:33,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:33,019 INFO L225 Difference]: With dead ends: 3263 [2021-03-10 15:02:33,020 INFO L226 Difference]: Without dead ends: 2852 [2021-03-10 15:02:33,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 556.4ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 15:02:33,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2852 states. [2021-03-10 15:02:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2852 to 1774. [2021-03-10 15:02:33,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1774 states, 1773 states have (on average 2.674562887760857) internal successors, (4742), 1773 states have internal predecessors, (4742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1774 states to 1774 states and 4742 transitions. [2021-03-10 15:02:33,041 INFO L78 Accepts]: Start accepts. Automaton has 1774 states and 4742 transitions. Word has length 94 [2021-03-10 15:02:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:33,041 INFO L480 AbstractCegarLoop]: Abstraction has 1774 states and 4742 transitions. [2021-03-10 15:02:33,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 1774 states and 4742 transitions. [2021-03-10 15:02:33,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:33,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:33,043 INFO L519 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] [2021-03-10 15:02:33,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 15:02:33,243 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:33,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:33,244 INFO L82 PathProgramCache]: Analyzing trace with hash 92629714, now seen corresponding path program 65 times [2021-03-10 15:02:33,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:33,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466912936] [2021-03-10 15:02:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466912936] [2021-03-10 15:02:33,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260454349] [2021-03-10 15:02:33,403 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 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 [2021-03-10 15:02:33,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 15:02:33,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:33,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:33,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:33,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:33,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:33,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321669732] [2021-03-10 15:02:33,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:33,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:33,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:33,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:33,608 INFO L87 Difference]: Start difference. First operand 1774 states and 4742 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:33,918 INFO L93 Difference]: Finished difference Result 2867 states and 7106 transitions. [2021-03-10 15:02:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 15:02:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:33,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:33,922 INFO L225 Difference]: With dead ends: 2867 [2021-03-10 15:02:33,922 INFO L226 Difference]: Without dead ends: 2597 [2021-03-10 15:02:33,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 344.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 15:02:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2597 states. [2021-03-10 15:02:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2597 to 1824. [2021-03-10 15:02:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1823 states have (on average 2.6834887547997806) internal successors, (4892), 1823 states have internal predecessors, (4892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 4892 transitions. [2021-03-10 15:02:33,942 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 4892 transitions. Word has length 99 [2021-03-10 15:02:33,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:33,942 INFO L480 AbstractCegarLoop]: Abstraction has 1824 states and 4892 transitions. [2021-03-10 15:02:33,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:33,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 4892 transitions. [2021-03-10 15:02:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:33,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:33,944 INFO L519 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] [2021-03-10 15:02:34,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:34,145 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash -136263856, now seen corresponding path program 66 times [2021-03-10 15:02:34,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:34,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134792256] [2021-03-10 15:02:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:34,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134792256] [2021-03-10 15:02:34,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032779261] [2021-03-10 15:02:34,307 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 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 [2021-03-10 15:02:34,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 15:02:34,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:34,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:34,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:34,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:34,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:34,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864209123] [2021-03-10 15:02:34,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:34,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:34,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:34,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:34,525 INFO L87 Difference]: Start difference. First operand 1824 states and 4892 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:34,867 INFO L93 Difference]: Finished difference Result 3242 states and 7956 transitions. [2021-03-10 15:02:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:34,870 INFO L225 Difference]: With dead ends: 3242 [2021-03-10 15:02:34,870 INFO L226 Difference]: Without dead ends: 2972 [2021-03-10 15:02:34,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 364.3ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-03-10 15:02:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 1924. [2021-03-10 15:02:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.699947997919917) internal successors, (5192), 1923 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5192 transitions. [2021-03-10 15:02:34,893 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5192 transitions. Word has length 99 [2021-03-10 15:02:34,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:34,893 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5192 transitions. [2021-03-10 15:02:34,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:34,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5192 transitions. [2021-03-10 15:02:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:34,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:34,894 INFO L519 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] [2021-03-10 15:02:35,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 15:02:35,095 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:35,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:35,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1800402610, now seen corresponding path program 67 times [2021-03-10 15:02:35,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:35,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459907827] [2021-03-10 15:02:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459907827] [2021-03-10 15:02:35,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830194868] [2021-03-10 15:02:35,233 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 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 [2021-03-10 15:02:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:35,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:35,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:35,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758583625] [2021-03-10 15:02:35,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:35,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:35,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:35,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:35,419 INFO L87 Difference]: Start difference. First operand 1924 states and 5192 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:35,807 INFO L93 Difference]: Finished difference Result 3242 states and 8056 transitions. [2021-03-10 15:02:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:35,810 INFO L225 Difference]: With dead ends: 3242 [2021-03-10 15:02:35,810 INFO L226 Difference]: Without dead ends: 2972 [2021-03-10 15:02:35,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 15:02:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-03-10 15:02:35,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2024. [2021-03-10 15:02:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.714780029658922) internal successors, (5492), 2023 states have internal predecessors, (5492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:35,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5492 transitions. [2021-03-10 15:02:35,833 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5492 transitions. Word has length 99 [2021-03-10 15:02:35,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:35,833 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 5492 transitions. [2021-03-10 15:02:35,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5492 transitions. [2021-03-10 15:02:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:35,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:35,835 INFO L519 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] [2021-03-10 15:02:36,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 15:02:36,037 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash -351530804, now seen corresponding path program 68 times [2021-03-10 15:02:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:36,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083988155] [2021-03-10 15:02:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083988155] [2021-03-10 15:02:36,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644446032] [2021-03-10 15:02:36,165 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 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 [2021-03-10 15:02:36,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:36,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:36,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:36,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:36,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:36,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:36,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886279468] [2021-03-10 15:02:36,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:36,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:36,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:36,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:36,353 INFO L87 Difference]: Start difference. First operand 2024 states and 5492 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:36,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:36,769 INFO L93 Difference]: Finished difference Result 3242 states and 8156 transitions. [2021-03-10 15:02:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:36,770 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:36,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:36,773 INFO L225 Difference]: With dead ends: 3242 [2021-03-10 15:02:36,773 INFO L226 Difference]: Without dead ends: 2972 [2021-03-10 15:02:36,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 392.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 15:02:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-03-10 15:02:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2124. [2021-03-10 15:02:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.728214790390956) internal successors, (5792), 2123 states have internal predecessors, (5792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:36,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5792 transitions. [2021-03-10 15:02:36,799 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5792 transitions. Word has length 99 [2021-03-10 15:02:36,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:36,799 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5792 transitions. [2021-03-10 15:02:36,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5792 transitions. [2021-03-10 15:02:36,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:36,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:36,801 INFO L519 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] [2021-03-10 15:02:37,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:37,002 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:37,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:37,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1985626678, now seen corresponding path program 69 times [2021-03-10 15:02:37,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:37,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903210003] [2021-03-10 15:02:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:37,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903210003] [2021-03-10 15:02:37,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214334341] [2021-03-10 15:02:37,139 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 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 [2021-03-10 15:02:37,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 15:02:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:37,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 15:02:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:37,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:37,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:37,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82251585] [2021-03-10 15:02:37,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:37,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:37,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:37,324 INFO L87 Difference]: Start difference. First operand 2124 states and 5792 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:37,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:37,769 INFO L93 Difference]: Finished difference Result 3242 states and 8256 transitions. [2021-03-10 15:02:37,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:37,773 INFO L225 Difference]: With dead ends: 3242 [2021-03-10 15:02:37,773 INFO L226 Difference]: Without dead ends: 2972 [2021-03-10 15:02:37,773 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 429.2ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 15:02:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-03-10 15:02:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2224. [2021-03-10 15:02:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.7404408457040037) internal successors, (6092), 2223 states have internal predecessors, (6092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 6092 transitions. [2021-03-10 15:02:37,798 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 6092 transitions. Word has length 99 [2021-03-10 15:02:37,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:37,798 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 6092 transitions. [2021-03-10 15:02:37,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:37,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 6092 transitions. [2021-03-10 15:02:37,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:37,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:37,801 INFO L519 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] [2021-03-10 15:02:38,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:38,003 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:38,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1664749496, now seen corresponding path program 70 times [2021-03-10 15:02:38,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:38,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117278098] [2021-03-10 15:02:38,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:38,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117278098] [2021-03-10 15:02:38,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252517562] [2021-03-10 15:02:38,130 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 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 [2021-03-10 15:02:38,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:38,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:38,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:38,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:38,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:38,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:38,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077489927] [2021-03-10 15:02:38,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:38,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:38,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:38,314 INFO L87 Difference]: Start difference. First operand 2224 states and 6092 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:38,820 INFO L93 Difference]: Finished difference Result 3242 states and 8356 transitions. [2021-03-10 15:02:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:02:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:38,824 INFO L225 Difference]: With dead ends: 3242 [2021-03-10 15:02:38,824 INFO L226 Difference]: Without dead ends: 2972 [2021-03-10 15:02:38,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 15:02:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2972 states. [2021-03-10 15:02:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2972 to 2324. [2021-03-10 15:02:38,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.751614291863969) internal successors, (6392), 2323 states have internal predecessors, (6392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:38,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6392 transitions. [2021-03-10 15:02:38,851 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6392 transitions. Word has length 99 [2021-03-10 15:02:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:38,851 INFO L480 AbstractCegarLoop]: Abstraction has 2324 states and 6392 transitions. [2021-03-10 15:02:38,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:38,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6392 transitions. [2021-03-10 15:02:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:38,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:38,854 INFO L519 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] [2021-03-10 15:02:39,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:39,054 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:39,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1941075898, now seen corresponding path program 71 times [2021-03-10 15:02:39,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:39,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801899480] [2021-03-10 15:02:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801899480] [2021-03-10 15:02:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367887565] [2021-03-10 15:02:39,182 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 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 [2021-03-10 15:02:39,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 15:02:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:39,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 15:02:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:39,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:39,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:39,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773775344] [2021-03-10 15:02:39,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:39,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:39,358 INFO L87 Difference]: Start difference. First operand 2324 states and 6392 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:39,918 INFO L93 Difference]: Finished difference Result 3965 states and 10458 transitions. [2021-03-10 15:02:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:02:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:39,923 INFO L225 Difference]: With dead ends: 3965 [2021-03-10 15:02:39,923 INFO L226 Difference]: Without dead ends: 3695 [2021-03-10 15:02:39,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 15:02:39,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2021-03-10 15:02:39,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 2499. [2021-03-10 15:02:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.7814251401120895) internal successors, (6948), 2498 states have internal predecessors, (6948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 6948 transitions. [2021-03-10 15:02:39,953 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 6948 transitions. Word has length 99 [2021-03-10 15:02:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:39,953 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 6948 transitions. [2021-03-10 15:02:39,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:39,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 6948 transitions. [2021-03-10 15:02:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-03-10 15:02:39,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:39,955 INFO L519 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] [2021-03-10 15:02:40,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:40,156 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1281503158, now seen corresponding path program 72 times [2021-03-10 15:02:40,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:40,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651987737] [2021-03-10 15:02:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:40,314 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:40,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651987737] [2021-03-10 15:02:40,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832591925] [2021-03-10 15:02:40,314 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 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 [2021-03-10 15:02:40,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 15:02:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:40,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:40,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:40,495 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:40,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:40,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-03-10 15:02:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579630954] [2021-03-10 15:02:40,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 15:02:40,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:40,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 15:02:40,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:02:40,496 INFO L87 Difference]: Start difference. First operand 2499 states and 6948 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:41,119 INFO L93 Difference]: Finished difference Result 3338 states and 8866 transitions. [2021-03-10 15:02:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:02:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 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 99 [2021-03-10 15:02:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:41,122 INFO L225 Difference]: With dead ends: 3338 [2021-03-10 15:02:41,123 INFO L226 Difference]: Without dead ends: 2927 [2021-03-10 15:02:41,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 563.1ms TimeCoverageRelationStatistics Valid=770, Invalid=2200, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 15:02:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2927 states. [2021-03-10 15:02:41,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2927 to 1713. [2021-03-10 15:02:41,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1712 states have (on average 2.677570093457944) internal successors, (4584), 1712 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:41,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 4584 transitions. [2021-03-10 15:02:41,144 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 4584 transitions. Word has length 99 [2021-03-10 15:02:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:41,144 INFO L480 AbstractCegarLoop]: Abstraction has 1713 states and 4584 transitions. [2021-03-10 15:02:41,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:41,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 4584 transitions. [2021-03-10 15:02:41,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:41,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:41,145 INFO L519 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] [2021-03-10 15:02:41,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:41,361 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:41,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:41,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1266453798, now seen corresponding path program 73 times [2021-03-10 15:02:41,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:41,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407494286] [2021-03-10 15:02:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:41,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407494286] [2021-03-10 15:02:41,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188149540] [2021-03-10 15:02:41,552 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 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 [2021-03-10 15:02:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:41,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:41,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:41,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-03-10 15:02:41,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974250190] [2021-03-10 15:02:41,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:02:41,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:41,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:02:41,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:02:41,796 INFO L87 Difference]: Start difference. First operand 1713 states and 4584 transitions. Second operand has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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) [2021-03-10 15:02:42,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:42,175 INFO L93 Difference]: Finished difference Result 2753 states and 6984 transitions. [2021-03-10 15:02:42,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 15:02:42,176 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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 104 [2021-03-10 15:02:42,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:42,179 INFO L225 Difference]: With dead ends: 2753 [2021-03-10 15:02:42,179 INFO L226 Difference]: Without dead ends: 2419 [2021-03-10 15:02:42,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 15:02:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2021-03-10 15:02:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1798. [2021-03-10 15:02:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1798 states, 1797 states have (on average 2.645520311630495) internal successors, (4754), 1797 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1798 states to 1798 states and 4754 transitions. [2021-03-10 15:02:42,198 INFO L78 Accepts]: Start accepts. Automaton has 1798 states and 4754 transitions. Word has length 104 [2021-03-10 15:02:42,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:42,199 INFO L480 AbstractCegarLoop]: Abstraction has 1798 states and 4754 transitions. [2021-03-10 15:02:42,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.88) internal successors, (122), 25 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) [2021-03-10 15:02:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1798 states and 4754 transitions. [2021-03-10 15:02:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:42,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:42,200 INFO L519 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] [2021-03-10 15:02:42,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 15:02:42,401 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:42,401 INFO L82 PathProgramCache]: Analyzing trace with hash 112290376, now seen corresponding path program 74 times [2021-03-10 15:02:42,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:42,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479535809] [2021-03-10 15:02:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:42,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479535809] [2021-03-10 15:02:42,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986862986] [2021-03-10 15:02:42,579 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 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 [2021-03-10 15:02:42,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:42,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:42,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:42,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:42,777 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:42,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:42,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:42,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992104179] [2021-03-10 15:02:42,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:42,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:42,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:42,778 INFO L87 Difference]: Start difference. First operand 1798 states and 4754 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:43,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:43,089 INFO L93 Difference]: Finished difference Result 3432 states and 8236 transitions. [2021-03-10 15:02:43,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:02:43,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:43,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:43,093 INFO L225 Difference]: With dead ends: 3432 [2021-03-10 15:02:43,093 INFO L226 Difference]: Without dead ends: 3162 [2021-03-10 15:02:43,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 357.0ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 15:02:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3162 states. [2021-03-10 15:02:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3162 to 1899. [2021-03-10 15:02:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.6564805057955745) internal successors, (5042), 1898 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:43,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5042 transitions. [2021-03-10 15:02:43,126 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5042 transitions. Word has length 104 [2021-03-10 15:02:43,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:43,126 INFO L480 AbstractCegarLoop]: Abstraction has 1899 states and 5042 transitions. [2021-03-10 15:02:43,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:43,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5042 transitions. [2021-03-10 15:02:43,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:43,128 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:43,128 INFO L519 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] [2021-03-10 15:02:43,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:43,328 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -283545944, now seen corresponding path program 75 times [2021-03-10 15:02:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:43,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269446713] [2021-03-10 15:02:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:43,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269446713] [2021-03-10 15:02:43,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464717865] [2021-03-10 15:02:43,496 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 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 [2021-03-10 15:02:43,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 15:02:43,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:43,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:02:43,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:43,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:43,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:43,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780558132] [2021-03-10 15:02:43,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:43,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:43,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:43,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:43,698 INFO L87 Difference]: Start difference. First operand 1899 states and 5042 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:44,073 INFO L93 Difference]: Finished difference Result 3417 states and 8306 transitions. [2021-03-10 15:02:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:02:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:44,077 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:44,078 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:44,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 391.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 15:02:44,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 1999. [2021-03-10 15:02:44,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 2.6736736736736737) internal successors, (5342), 1998 states have internal predecessors, (5342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 5342 transitions. [2021-03-10 15:02:44,101 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 5342 transitions. Word has length 104 [2021-03-10 15:02:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:44,101 INFO L480 AbstractCegarLoop]: Abstraction has 1999 states and 5342 transitions. [2021-03-10 15:02:44,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 5342 transitions. [2021-03-10 15:02:44,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:44,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:44,102 INFO L519 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] [2021-03-10 15:02:44,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:44,303 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:44,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:44,303 INFO L82 PathProgramCache]: Analyzing trace with hash -512439514, now seen corresponding path program 76 times [2021-03-10 15:02:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:44,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716587763] [2021-03-10 15:02:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716587763] [2021-03-10 15:02:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513123990] [2021-03-10 15:02:44,468 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 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 [2021-03-10 15:02:44,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:44,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:44,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:44,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:44,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603917897] [2021-03-10 15:02:44,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:44,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:44,691 INFO L87 Difference]: Start difference. First operand 1999 states and 5342 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:45,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:45,058 INFO L93 Difference]: Finished difference Result 3417 states and 8406 transitions. [2021-03-10 15:02:45,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:02:45,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:45,062 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:45,062 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:45,063 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 414.0ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 15:02:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:45,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2099. [2021-03-10 15:02:45,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 2098 states have (on average 2.6892278360343185) internal successors, (5642), 2098 states have internal predecessors, (5642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 5642 transitions. [2021-03-10 15:02:45,087 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 5642 transitions. Word has length 104 [2021-03-10 15:02:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:45,087 INFO L480 AbstractCegarLoop]: Abstraction has 2099 states and 5642 transitions. [2021-03-10 15:02:45,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 5642 transitions. [2021-03-10 15:02:45,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:45,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:45,089 INFO L519 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] [2021-03-10 15:02:45,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 15:02:45,290 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:45,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2118389028, now seen corresponding path program 77 times [2021-03-10 15:02:45,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:45,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894985995] [2021-03-10 15:02:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:45,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894985995] [2021-03-10 15:02:45,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367371939] [2021-03-10 15:02:45,456 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 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 [2021-03-10 15:02:45,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 15:02:45,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:45,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:45,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:45,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:45,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:45,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926927519] [2021-03-10 15:02:45,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:45,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:45,649 INFO L87 Difference]: Start difference. First operand 2099 states and 5642 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:46,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:46,065 INFO L93 Difference]: Finished difference Result 3417 states and 8506 transitions. [2021-03-10 15:02:46,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:46,066 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:46,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:46,070 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:46,070 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:46,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 15:02:46,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2199. [2021-03-10 15:02:46,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2199 states, 2198 states have (on average 2.70336669699727) internal successors, (5942), 2198 states have internal predecessors, (5942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:46,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2199 states to 2199 states and 5942 transitions. [2021-03-10 15:02:46,106 INFO L78 Accepts]: Start accepts. Automaton has 2199 states and 5942 transitions. Word has length 104 [2021-03-10 15:02:46,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:46,106 INFO L480 AbstractCegarLoop]: Abstraction has 2199 states and 5942 transitions. [2021-03-10 15:02:46,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:46,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2199 states and 5942 transitions. [2021-03-10 15:02:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:46,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:46,109 INFO L519 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] [2021-03-10 15:02:46,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:46,324 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:46,324 INFO L82 PathProgramCache]: Analyzing trace with hash -727706462, now seen corresponding path program 78 times [2021-03-10 15:02:46,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:46,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489761329] [2021-03-10 15:02:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489761329] [2021-03-10 15:02:46,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880697548] [2021-03-10 15:02:46,471 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 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 [2021-03-10 15:02:46,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 15:02:46,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:46,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:02:46,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:46,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:46,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:46,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493318405] [2021-03-10 15:02:46,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:46,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:46,693 INFO L87 Difference]: Start difference. First operand 2199 states and 5942 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:47,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:47,144 INFO L93 Difference]: Finished difference Result 3417 states and 8606 transitions. [2021-03-10 15:02:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:47,144 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:47,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:47,148 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:47,148 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:47,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:02:47,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2299. [2021-03-10 15:02:47,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2299 states, 2298 states have (on average 2.7162750217580505) internal successors, (6242), 2298 states have internal predecessors, (6242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:47,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 6242 transitions. [2021-03-10 15:02:47,175 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 6242 transitions. Word has length 104 [2021-03-10 15:02:47,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:47,175 INFO L480 AbstractCegarLoop]: Abstraction has 2299 states and 6242 transitions. [2021-03-10 15:02:47,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:47,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 6242 transitions. [2021-03-10 15:02:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:47,177 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:47,177 INFO L519 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] [2021-03-10 15:02:47,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:47,378 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1933164960, now seen corresponding path program 79 times [2021-03-10 15:02:47,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:47,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607588253] [2021-03-10 15:02:47,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607588253] [2021-03-10 15:02:47,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724363270] [2021-03-10 15:02:47,518 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 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 [2021-03-10 15:02:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:47,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:47,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:47,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:47,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:47,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034476061] [2021-03-10 15:02:47,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:47,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:47,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:47,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:47,724 INFO L87 Difference]: Start difference. First operand 2299 states and 6242 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:48,198 INFO L93 Difference]: Finished difference Result 3417 states and 8706 transitions. [2021-03-10 15:02:48,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:48,198 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:48,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:48,202 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:48,202 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:48,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 15:02:48,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2399. [2021-03-10 15:02:48,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 2398 states have (on average 2.7281067556296916) internal successors, (6542), 2398 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 6542 transitions. [2021-03-10 15:02:48,227 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 6542 transitions. Word has length 104 [2021-03-10 15:02:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:48,227 INFO L480 AbstractCegarLoop]: Abstraction has 2399 states and 6542 transitions. [2021-03-10 15:02:48,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 6542 transitions. [2021-03-10 15:02:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:48,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:48,229 INFO L519 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] [2021-03-10 15:02:48,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:48,429 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash -2040925154, now seen corresponding path program 80 times [2021-03-10 15:02:48,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:48,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645777179] [2021-03-10 15:02:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645777179] [2021-03-10 15:02:48,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796090764] [2021-03-10 15:02:48,582 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 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 [2021-03-10 15:02:48,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:48,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:48,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:48,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:48,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151153567] [2021-03-10 15:02:48,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:48,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:48,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:48,769 INFO L87 Difference]: Start difference. First operand 2399 states and 6542 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:49,290 INFO L93 Difference]: Finished difference Result 3417 states and 8806 transitions. [2021-03-10 15:02:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:02:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:49,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:49,293 INFO L225 Difference]: With dead ends: 3417 [2021-03-10 15:02:49,293 INFO L226 Difference]: Without dead ends: 3147 [2021-03-10 15:02:49,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 502.8ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 15:02:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3147 states. [2021-03-10 15:02:49,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3147 to 2499. [2021-03-10 15:02:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 2.7389911929543636) internal successors, (6842), 2498 states have internal predecessors, (6842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 6842 transitions. [2021-03-10 15:02:49,320 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 6842 transitions. Word has length 104 [2021-03-10 15:02:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:49,320 INFO L480 AbstractCegarLoop]: Abstraction has 2499 states and 6842 transitions. [2021-03-10 15:02:49,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 6842 transitions. [2021-03-10 15:02:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:49,322 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:49,322 INFO L519 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] [2021-03-10 15:02:49,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-03-10 15:02:49,522 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1977715740, now seen corresponding path program 81 times [2021-03-10 15:02:49,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:49,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932437747] [2021-03-10 15:02:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:49,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932437747] [2021-03-10 15:02:49,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887065162] [2021-03-10 15:02:49,659 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 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 [2021-03-10 15:02:49,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 15:02:49,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:49,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:49,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:49,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874488062] [2021-03-10 15:02:49,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:49,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:49,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:49,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:49,855 INFO L87 Difference]: Start difference. First operand 2499 states and 6842 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:50,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:50,402 INFO L93 Difference]: Finished difference Result 4165 states and 10958 transitions. [2021-03-10 15:02:50,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:02:50,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:50,408 INFO L225 Difference]: With dead ends: 4165 [2021-03-10 15:02:50,408 INFO L226 Difference]: Without dead ends: 3895 [2021-03-10 15:02:50,409 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 15:02:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2021-03-10 15:02:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 2674. [2021-03-10 15:02:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2673 states have (on average 2.7676767676767677) internal successors, (7398), 2673 states have internal predecessors, (7398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 7398 transitions. [2021-03-10 15:02:50,440 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 7398 transitions. Word has length 104 [2021-03-10 15:02:50,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:50,441 INFO L480 AbstractCegarLoop]: Abstraction has 2674 states and 7398 transitions. [2021-03-10 15:02:50,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:50,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 7398 transitions. [2021-03-10 15:02:50,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-03-10 15:02:50,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:50,443 INFO L519 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] [2021-03-10 15:02:50,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:50,643 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:50,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:50,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1657678816, now seen corresponding path program 82 times [2021-03-10 15:02:50,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:50,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065589909] [2021-03-10 15:02:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065589909] [2021-03-10 15:02:50,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667262619] [2021-03-10 15:02:50,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 15:02:50,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:50,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 15:02:50,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:50,982 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:50,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:50,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-03-10 15:02:50,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133709457] [2021-03-10 15:02:50,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:50,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:50,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:50,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:50,983 INFO L87 Difference]: Start difference. First operand 2674 states and 7398 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:51,678 INFO L93 Difference]: Finished difference Result 3563 states and 9416 transitions. [2021-03-10 15:02:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 15:02:51,679 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 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 104 [2021-03-10 15:02:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:51,683 INFO L225 Difference]: With dead ends: 3563 [2021-03-10 15:02:51,683 INFO L226 Difference]: Without dead ends: 3152 [2021-03-10 15:02:51,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 668.6ms TimeCoverageRelationStatistics Valid=935, Invalid=2371, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 15:02:51,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-03-10 15:02:51,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 1924. [2021-03-10 15:02:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.6739469578783153) internal successors, (5142), 1923 states have internal predecessors, (5142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5142 transitions. [2021-03-10 15:02:51,707 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5142 transitions. Word has length 104 [2021-03-10 15:02:51,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:51,708 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5142 transitions. [2021-03-10 15:02:51,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:51,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5142 transitions. [2021-03-10 15:02:51,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:51,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:51,709 INFO L519 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] [2021-03-10 15:02:51,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-03-10 15:02:51,923 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:51,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1269378563, now seen corresponding path program 83 times [2021-03-10 15:02:51,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:51,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099781316] [2021-03-10 15:02:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:52,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099781316] [2021-03-10 15:02:52,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399345497] [2021-03-10 15:02:52,110 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 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 [2021-03-10 15:02:52,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 15:02:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:52,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:52,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:52,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:52,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:52,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422723794] [2021-03-10 15:02:52,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:52,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:52,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:52,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:52,320 INFO L87 Difference]: Start difference. First operand 1924 states and 5142 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) [2021-03-10 15:02:52,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:52,676 INFO L93 Difference]: Finished difference Result 3117 states and 7706 transitions. [2021-03-10 15:02:52,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 15:02:52,677 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 109 [2021-03-10 15:02:52,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:52,680 INFO L225 Difference]: With dead ends: 3117 [2021-03-10 15:02:52,680 INFO L226 Difference]: Without dead ends: 2847 [2021-03-10 15:02:52,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:02:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-03-10 15:02:52,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 1974. [2021-03-10 15:02:52,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 2.6822098327420174) internal successors, (5292), 1973 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 5292 transitions. [2021-03-10 15:02:52,701 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 5292 transitions. Word has length 109 [2021-03-10 15:02:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:52,701 INFO L480 AbstractCegarLoop]: Abstraction has 1974 states and 5292 transitions. [2021-03-10 15:02:52,701 INFO L481 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) [2021-03-10 15:02:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 5292 transitions. [2021-03-10 15:02:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:52,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:52,703 INFO L519 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] [2021-03-10 15:02:52,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-10 15:02:52,904 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1055816447, now seen corresponding path program 84 times [2021-03-10 15:02:52,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:52,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035619335] [2021-03-10 15:02:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:52,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:53,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035619335] [2021-03-10 15:02:53,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498287692] [2021-03-10 15:02:53,077 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 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 [2021-03-10 15:02:53,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 15:02:53,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:02:53,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:53,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:53,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101568676] [2021-03-10 15:02:53,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:53,273 INFO L87 Difference]: Start difference. First operand 1974 states and 5292 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) [2021-03-10 15:02:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:53,674 INFO L93 Difference]: Finished difference Result 3542 states and 8656 transitions. [2021-03-10 15:02:53,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:02:53,674 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 109 [2021-03-10 15:02:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:53,678 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:53,678 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:53,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=531, Invalid=1631, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 15:02:53,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:53,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2074. [2021-03-10 15:02:53,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.6975397973950797) internal successors, (5592), 2073 states have internal predecessors, (5592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:53,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5592 transitions. [2021-03-10 15:02:53,701 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5592 transitions. Word has length 109 [2021-03-10 15:02:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:53,701 INFO L480 AbstractCegarLoop]: Abstraction has 2074 states and 5592 transitions. [2021-03-10 15:02:53,701 INFO L481 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) [2021-03-10 15:02:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5592 transitions. [2021-03-10 15:02:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:53,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:53,703 INFO L519 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] [2021-03-10 15:02:53,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:53,903 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:53,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1284710017, now seen corresponding path program 85 times [2021-03-10 15:02:53,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:53,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362720375] [2021-03-10 15:02:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:53,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:54,067 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:54,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362720375] [2021-03-10 15:02:54,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140842649] [2021-03-10 15:02:54,067 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 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 [2021-03-10 15:02:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:54,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:54,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:54,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:54,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811228163] [2021-03-10 15:02:54,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:54,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:54,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:54,307 INFO L87 Difference]: Start difference. First operand 2074 states and 5592 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) [2021-03-10 15:02:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:54,735 INFO L93 Difference]: Finished difference Result 3542 states and 8756 transitions. [2021-03-10 15:02:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:02:54,736 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 109 [2021-03-10 15:02:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:54,740 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:54,740 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:54,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=569, Invalid=1783, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:02:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2174. [2021-03-10 15:02:54,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2174 states, 2173 states have (on average 2.7114588127013346) internal successors, (5892), 2173 states have internal predecessors, (5892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2174 states to 2174 states and 5892 transitions. [2021-03-10 15:02:54,767 INFO L78 Accepts]: Start accepts. Automaton has 2174 states and 5892 transitions. Word has length 109 [2021-03-10 15:02:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:54,767 INFO L480 AbstractCegarLoop]: Abstraction has 2174 states and 5892 transitions. [2021-03-10 15:02:54,767 INFO L481 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) [2021-03-10 15:02:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2174 states and 5892 transitions. [2021-03-10 15:02:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:54,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:54,769 INFO L519 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] [2021-03-10 15:02:54,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:54,969 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1346118525, now seen corresponding path program 86 times [2021-03-10 15:02:54,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:54,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736102624] [2021-03-10 15:02:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:55,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736102624] [2021-03-10 15:02:55,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391380198] [2021-03-10 15:02:55,129 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 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 [2021-03-10 15:02:55,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:02:55,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:55,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:55,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:55,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:55,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936786040] [2021-03-10 15:02:55,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:55,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:55,331 INFO L87 Difference]: Start difference. First operand 2174 states and 5892 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) [2021-03-10 15:02:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:55,793 INFO L93 Difference]: Finished difference Result 3542 states and 8856 transitions. [2021-03-10 15:02:55,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:02:55,794 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 109 [2021-03-10 15:02:55,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:55,797 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:55,798 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:55,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=623, Invalid=1927, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 15:02:55,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:55,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2274. [2021-03-10 15:02:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2274 states, 2273 states have (on average 2.7241531016278047) internal successors, (6192), 2273 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 6192 transitions. [2021-03-10 15:02:55,824 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 6192 transitions. Word has length 109 [2021-03-10 15:02:55,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:55,824 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 6192 transitions. [2021-03-10 15:02:55,824 INFO L481 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) [2021-03-10 15:02:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 6192 transitions. [2021-03-10 15:02:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:55,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:55,826 INFO L519 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] [2021-03-10 15:02:56,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:02:56,027 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:56,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:56,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1499976965, now seen corresponding path program 87 times [2021-03-10 15:02:56,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:56,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928528976] [2021-03-10 15:02:56,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:56,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:56,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928528976] [2021-03-10 15:02:56,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944618670] [2021-03-10 15:02:56,184 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 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 [2021-03-10 15:02:56,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-03-10 15:02:56,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:56,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 15:02:56,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:56,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:56,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:56,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134743863] [2021-03-10 15:02:56,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:56,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:56,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:56,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:56,374 INFO L87 Difference]: Start difference. First operand 2274 states and 6192 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) [2021-03-10 15:02:56,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:56,890 INFO L93 Difference]: Finished difference Result 3542 states and 8956 transitions. [2021-03-10 15:02:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:02:56,890 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 109 [2021-03-10 15:02:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:56,894 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:56,894 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:56,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=693, Invalid=2063, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 15:02:56,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:56,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2374. [2021-03-10 15:02:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2374 states, 2373 states have (on average 2.735777496839444) internal successors, (6492), 2373 states have internal predecessors, (6492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:56,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2374 states to 2374 states and 6492 transitions. [2021-03-10 15:02:56,920 INFO L78 Accepts]: Start accepts. Automaton has 2374 states and 6492 transitions. Word has length 109 [2021-03-10 15:02:56,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:56,920 INFO L480 AbstractCegarLoop]: Abstraction has 2374 states and 6492 transitions. [2021-03-10 15:02:56,920 INFO L481 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) [2021-03-10 15:02:56,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2374 states and 6492 transitions. [2021-03-10 15:02:56,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:56,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:56,922 INFO L519 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] [2021-03-10 15:02:57,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 15:02:57,123 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1160894457, now seen corresponding path program 88 times [2021-03-10 15:02:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:57,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182436577] [2021-03-10 15:02:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:57,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182436577] [2021-03-10 15:02:57,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381600546] [2021-03-10 15:02:57,274 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 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 [2021-03-10 15:02:57,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:02:57,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:57,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:57,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:57,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:57,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717374111] [2021-03-10 15:02:57,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:57,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:57,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:57,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:57,469 INFO L87 Difference]: Start difference. First operand 2374 states and 6492 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) [2021-03-10 15:02:57,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:57,988 INFO L93 Difference]: Finished difference Result 3542 states and 9056 transitions. [2021-03-10 15:02:57,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:02:57,988 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 109 [2021-03-10 15:02:57,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:57,992 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:57,992 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:57,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=779, Invalid=2191, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 15:02:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:58,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2474. [2021-03-10 15:02:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 2.746461787302871) internal successors, (6792), 2473 states have internal predecessors, (6792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 6792 transitions. [2021-03-10 15:02:58,031 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 6792 transitions. Word has length 109 [2021-03-10 15:02:58,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:58,031 INFO L480 AbstractCegarLoop]: Abstraction has 2474 states and 6792 transitions. [2021-03-10 15:02:58,032 INFO L481 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) [2021-03-10 15:02:58,032 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 6792 transitions. [2021-03-10 15:02:58,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:58,033 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:58,033 INFO L519 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] [2021-03-10 15:02:58,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 15:02:58,241 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1481771639, now seen corresponding path program 89 times [2021-03-10 15:02:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:58,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387443161] [2021-03-10 15:02:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:58,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387443161] [2021-03-10 15:02:58,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51113946] [2021-03-10 15:02:58,386 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 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 [2021-03-10 15:02:58,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 15:02:58,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:58,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:02:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:58,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:58,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263500276] [2021-03-10 15:02:58,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:58,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:58,569 INFO L87 Difference]: Start difference. First operand 2474 states and 6792 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) [2021-03-10 15:02:59,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:02:59,145 INFO L93 Difference]: Finished difference Result 3542 states and 9156 transitions. [2021-03-10 15:02:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 15:02:59,146 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 109 [2021-03-10 15:02:59,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:02:59,150 INFO L225 Difference]: With dead ends: 3542 [2021-03-10 15:02:59,150 INFO L226 Difference]: Without dead ends: 3272 [2021-03-10 15:02:59,151 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=881, Invalid=2311, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 15:02:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2021-03-10 15:02:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2574. [2021-03-10 15:02:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2574 states, 2573 states have (on average 2.7563155849203267) internal successors, (7092), 2573 states have internal predecessors, (7092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:02:59,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2574 states to 2574 states and 7092 transitions. [2021-03-10 15:02:59,180 INFO L78 Accepts]: Start accepts. Automaton has 2574 states and 7092 transitions. Word has length 109 [2021-03-10 15:02:59,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:02:59,181 INFO L480 AbstractCegarLoop]: Abstraction has 2574 states and 7092 transitions. [2021-03-10 15:02:59,181 INFO L481 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) [2021-03-10 15:02:59,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2574 states and 7092 transitions. [2021-03-10 15:02:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:02:59,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:02:59,183 INFO L519 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] [2021-03-10 15:02:59,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 15:02:59,383 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:02:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:02:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1205445237, now seen corresponding path program 90 times [2021-03-10 15:02:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:02:59,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056708193] [2021-03-10 15:02:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:02:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:02:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:59,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056708193] [2021-03-10 15:02:59,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366567349] [2021-03-10 15:02:59,536 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 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 [2021-03-10 15:02:59,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 15:02:59,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:02:59,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:02:59,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:02:59,743 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:02:59,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:02:59,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-03-10 15:02:59,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494753275] [2021-03-10 15:02:59,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 15:02:59,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:02:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 15:02:59,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:02:59,744 INFO L87 Difference]: Start difference. First operand 2574 states and 7092 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) [2021-03-10 15:03:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:00,355 INFO L93 Difference]: Finished difference Result 4265 states and 11258 transitions. [2021-03-10 15:03:00,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 15:03:00,355 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 109 [2021-03-10 15:03:00,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:00,360 INFO L225 Difference]: With dead ends: 4265 [2021-03-10 15:03:00,360 INFO L226 Difference]: Without dead ends: 3995 [2021-03-10 15:03:00,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=1000, Invalid=2422, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 15:03:00,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3995 states. [2021-03-10 15:03:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3995 to 2749. [2021-03-10 15:03:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.7831149927219796) internal successors, (7648), 2748 states have internal predecessors, (7648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7648 transitions. [2021-03-10 15:03:00,393 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7648 transitions. Word has length 109 [2021-03-10 15:03:00,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:00,393 INFO L480 AbstractCegarLoop]: Abstraction has 2749 states and 7648 transitions. [2021-03-10 15:03:00,393 INFO L481 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) [2021-03-10 15:03:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7648 transitions. [2021-03-10 15:03:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-03-10 15:03:00,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:00,395 INFO L519 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] [2021-03-10 15:03:00,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 15:03:00,607 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:00,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1865017977, now seen corresponding path program 91 times [2021-03-10 15:03:00,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:00,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367936813] [2021-03-10 15:03:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:00,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367936813] [2021-03-10 15:03:00,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805616789] [2021-03-10 15:03:00,759 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 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 [2021-03-10 15:03:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:00,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2021-03-10 15:03:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:00,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:00,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-03-10 15:03:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232228651] [2021-03-10 15:03:00,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:00,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:00,953 INFO L87 Difference]: Start difference. First operand 2749 states and 7648 transitions. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:01,710 INFO L93 Difference]: Finished difference Result 3638 states and 9666 transitions. [2021-03-10 15:03:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 15:03:01,710 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 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 109 [2021-03-10 15:03:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:01,714 INFO L225 Difference]: With dead ends: 3638 [2021-03-10 15:03:01,714 INFO L226 Difference]: Without dead ends: 3227 [2021-03-10 15:03:01,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 710.0ms TimeCoverageRelationStatistics Valid=1036, Invalid=2624, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 15:03:01,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2021-03-10 15:03:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 1863. [2021-03-10 15:03:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.6766917293233083) internal successors, (4984), 1862 states have internal predecessors, (4984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:01,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 4984 transitions. [2021-03-10 15:03:01,738 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 4984 transitions. Word has length 109 [2021-03-10 15:03:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:01,738 INFO L480 AbstractCegarLoop]: Abstraction has 1863 states and 4984 transitions. [2021-03-10 15:03:01,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 4984 transitions. [2021-03-10 15:03:01,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:01,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:01,739 INFO L519 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] [2021-03-10 15:03:01,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 15:03:01,940 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1578972149, now seen corresponding path program 92 times [2021-03-10 15:03:01,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:01,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712144163] [2021-03-10 15:03:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:02,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712144163] [2021-03-10 15:03:02,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716140526] [2021-03-10 15:03:02,147 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 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 [2021-03-10 15:03:02,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:03:02,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:02,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:02,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:02,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-03-10 15:03:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979723399] [2021-03-10 15:03:02,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 15:03:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 15:03:02,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2021-03-10 15:03:02,377 INFO L87 Difference]: Start difference. First operand 1863 states and 4984 transitions. Second operand has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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) [2021-03-10 15:03:02,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:02,811 INFO L93 Difference]: Finished difference Result 2953 states and 7484 transitions. [2021-03-10 15:03:02,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 15:03:02,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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 114 [2021-03-10 15:03:02,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:02,815 INFO L225 Difference]: With dead ends: 2953 [2021-03-10 15:03:02,815 INFO L226 Difference]: Without dead ends: 2619 [2021-03-10 15:03:02,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 492.7ms TimeCoverageRelationStatistics Valid=645, Invalid=1805, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 15:03:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-03-10 15:03:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 1948. [2021-03-10 15:03:02,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1947 states have (on average 2.647149460708783) internal successors, (5154), 1947 states have internal predecessors, (5154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:02,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 5154 transitions. [2021-03-10 15:03:02,835 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 5154 transitions. Word has length 114 [2021-03-10 15:03:02,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:02,835 INFO L480 AbstractCegarLoop]: Abstraction has 1948 states and 5154 transitions. [2021-03-10 15:03:02,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.0) internal successors, (130), 26 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) [2021-03-10 15:03:02,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 5154 transitions. [2021-03-10 15:03:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:02,836 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:02,836 INFO L519 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] [2021-03-10 15:03:03,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 15:03:03,037 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:03,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:03,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2104700423, now seen corresponding path program 93 times [2021-03-10 15:03:03,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:03,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678034893] [2021-03-10 15:03:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678034893] [2021-03-10 15:03:03,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104684080] [2021-03-10 15:03:03,241 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 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 [2021-03-10 15:03:03,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 15:03:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:03,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 15:03:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:03,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:03,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:03,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065201357] [2021-03-10 15:03:03,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:03,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:03,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:03,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:03,450 INFO L87 Difference]: Start difference. First operand 1948 states and 5154 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) [2021-03-10 15:03:03,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:03,790 INFO L93 Difference]: Finished difference Result 3732 states and 8936 transitions. [2021-03-10 15:03:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 15:03:03,791 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 114 [2021-03-10 15:03:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:03,795 INFO L225 Difference]: With dead ends: 3732 [2021-03-10 15:03:03,795 INFO L226 Difference]: Without dead ends: 3462 [2021-03-10 15:03:03,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=512, Invalid=1380, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 15:03:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3462 states. [2021-03-10 15:03:03,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3462 to 2049. [2021-03-10 15:03:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 2.6572265625) internal successors, (5442), 2048 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 5442 transitions. [2021-03-10 15:03:03,819 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 5442 transitions. Word has length 114 [2021-03-10 15:03:03,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:03,819 INFO L480 AbstractCegarLoop]: Abstraction has 2049 states and 5442 transitions. [2021-03-10 15:03:03,819 INFO L481 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) [2021-03-10 15:03:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 5442 transitions. [2021-03-10 15:03:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:03,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:03,821 INFO L519 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] [2021-03-10 15:03:04,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 15:03:04,022 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:04,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:04,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1904402009, now seen corresponding path program 94 times [2021-03-10 15:03:04,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:04,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060472239] [2021-03-10 15:03:04,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:04,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060472239] [2021-03-10 15:03:04,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768143571] [2021-03-10 15:03:04,227 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 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 [2021-03-10 15:03:04,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:03:04,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:04,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:04,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:04,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:04,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:04,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:04,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618849668] [2021-03-10 15:03:04,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:04,424 INFO L87 Difference]: Start difference. First operand 2049 states and 5442 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) [2021-03-10 15:03:04,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:04,810 INFO L93 Difference]: Finished difference Result 3717 states and 9006 transitions. [2021-03-10 15:03:04,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 15:03:04,810 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 114 [2021-03-10 15:03:04,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:04,814 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:04,814 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:04,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 435.4ms TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 15:03:04,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:04,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2149. [2021-03-10 15:03:04,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2149 states, 2148 states have (on average 2.6731843575418996) internal successors, (5742), 2148 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2149 states to 2149 states and 5742 transitions. [2021-03-10 15:03:04,840 INFO L78 Accepts]: Start accepts. Automaton has 2149 states and 5742 transitions. Word has length 114 [2021-03-10 15:03:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:04,840 INFO L480 AbstractCegarLoop]: Abstraction has 2149 states and 5742 transitions. [2021-03-10 15:03:04,840 INFO L481 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) [2021-03-10 15:03:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 2149 states and 5742 transitions. [2021-03-10 15:03:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:04,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:04,842 INFO L519 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] [2021-03-10 15:03:05,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:05,042 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -420793001, now seen corresponding path program 95 times [2021-03-10 15:03:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:05,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6487937] [2021-03-10 15:03:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:05,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6487937] [2021-03-10 15:03:05,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747063900] [2021-03-10 15:03:05,231 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 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 [2021-03-10 15:03:05,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 15:03:05,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:05,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:05,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:05,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:05,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:05,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526939551] [2021-03-10 15:03:05,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:05,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:05,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:05,429 INFO L87 Difference]: Start difference. First operand 2149 states and 5742 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) [2021-03-10 15:03:05,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:05,869 INFO L93 Difference]: Finished difference Result 3717 states and 9106 transitions. [2021-03-10 15:03:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 15:03:05,870 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 114 [2021-03-10 15:03:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:05,873 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:05,873 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:05,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 448.3ms TimeCoverageRelationStatistics Valid=542, Invalid=1714, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 15:03:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2249. [2021-03-10 15:03:05,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 2.6877224199288254) internal successors, (6042), 2248 states have internal predecessors, (6042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:05,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 6042 transitions. [2021-03-10 15:03:05,901 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 6042 transitions. Word has length 114 [2021-03-10 15:03:05,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:05,901 INFO L480 AbstractCegarLoop]: Abstraction has 2249 states and 6042 transitions. [2021-03-10 15:03:05,901 INFO L481 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) [2021-03-10 15:03:05,901 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 6042 transitions. [2021-03-10 15:03:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:05,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:05,903 INFO L519 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] [2021-03-10 15:03:06,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 15:03:06,104 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:06,104 INFO L82 PathProgramCache]: Analyzing trace with hash -649686571, now seen corresponding path program 96 times [2021-03-10 15:03:06,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:06,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671118076] [2021-03-10 15:03:06,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:06,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671118076] [2021-03-10 15:03:06,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714512724] [2021-03-10 15:03:06,282 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 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 [2021-03-10 15:03:06,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 15:03:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 15:03:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:06,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:06,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203729195] [2021-03-10 15:03:06,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:06,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:06,489 INFO L87 Difference]: Start difference. First operand 2249 states and 6042 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) [2021-03-10 15:03:06,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:06,972 INFO L93 Difference]: Finished difference Result 3717 states and 9206 transitions. [2021-03-10 15:03:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:03:06,972 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 114 [2021-03-10 15:03:06,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:06,976 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:06,976 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:06,976 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 15:03:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2349. [2021-03-10 15:03:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2349 states, 2348 states have (on average 2.701022146507666) internal successors, (6342), 2348 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 6342 transitions. [2021-03-10 15:03:07,001 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 6342 transitions. Word has length 114 [2021-03-10 15:03:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:07,001 INFO L480 AbstractCegarLoop]: Abstraction has 2349 states and 6342 transitions. [2021-03-10 15:03:07,002 INFO L481 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) [2021-03-10 15:03:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 6342 transitions. [2021-03-10 15:03:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:07,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:07,003 INFO L519 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] [2021-03-10 15:03:07,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:07,207 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:07,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:07,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1981141971, now seen corresponding path program 97 times [2021-03-10 15:03:07,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:07,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106232671] [2021-03-10 15:03:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:07,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106232671] [2021-03-10 15:03:07,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794192065] [2021-03-10 15:03:07,379 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 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 [2021-03-10 15:03:07,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:07,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:07,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:07,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:07,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:07,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901888595] [2021-03-10 15:03:07,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:07,583 INFO L87 Difference]: Start difference. First operand 2349 states and 6342 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) [2021-03-10 15:03:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:08,100 INFO L93 Difference]: Finished difference Result 3717 states and 9306 transitions. [2021-03-10 15:03:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:03:08,101 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 114 [2021-03-10 15:03:08,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:08,105 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:08,105 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:08,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 501.3ms TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 15:03:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2449. [2021-03-10 15:03:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2448 states have (on average 2.713235294117647) internal successors, (6642), 2448 states have internal predecessors, (6642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 6642 transitions. [2021-03-10 15:03:08,137 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 6642 transitions. Word has length 114 [2021-03-10 15:03:08,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:08,137 INFO L480 AbstractCegarLoop]: Abstraction has 2449 states and 6642 transitions. [2021-03-10 15:03:08,137 INFO L481 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) [2021-03-10 15:03:08,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 6642 transitions. [2021-03-10 15:03:08,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:08,139 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:08,139 INFO L519 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] [2021-03-10 15:03:08,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-10 15:03:08,339 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:08,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:08,340 INFO L82 PathProgramCache]: Analyzing trace with hash -864953519, now seen corresponding path program 98 times [2021-03-10 15:03:08,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:08,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292071297] [2021-03-10 15:03:08,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:08,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292071297] [2021-03-10 15:03:08,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759448949] [2021-03-10 15:03:08,521 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 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 [2021-03-10 15:03:08,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:03:08,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:08,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:08,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:08,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:08,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183029413] [2021-03-10 15:03:08,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:08,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:08,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:08,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:08,709 INFO L87 Difference]: Start difference. First operand 2449 states and 6642 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) [2021-03-10 15:03:09,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:09,265 INFO L93 Difference]: Finished difference Result 3717 states and 9406 transitions. [2021-03-10 15:03:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:03:09,265 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 114 [2021-03-10 15:03:09,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:09,270 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:09,270 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:09,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 535.2ms TimeCoverageRelationStatistics Valid=707, Invalid=2155, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 15:03:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:09,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2549. [2021-03-10 15:03:09,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2549 states, 2548 states have (on average 2.7244897959183674) internal successors, (6942), 2548 states have internal predecessors, (6942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2549 states to 2549 states and 6942 transitions. [2021-03-10 15:03:09,300 INFO L78 Accepts]: Start accepts. Automaton has 2549 states and 6942 transitions. Word has length 114 [2021-03-10 15:03:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:09,301 INFO L480 AbstractCegarLoop]: Abstraction has 2549 states and 6942 transitions. [2021-03-10 15:03:09,301 INFO L481 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) [2021-03-10 15:03:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 2549 states and 6942 transitions. [2021-03-10 15:03:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:09,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:09,303 INFO L519 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] [2021-03-10 15:03:09,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:09,503 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1795917903, now seen corresponding path program 99 times [2021-03-10 15:03:09,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:09,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291139] [2021-03-10 15:03:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:09,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291139] [2021-03-10 15:03:09,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608528540] [2021-03-10 15:03:09,669 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 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 [2021-03-10 15:03:09,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 15:03:09,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:09,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 15:03:09,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:09,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:09,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:09,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624307868] [2021-03-10 15:03:09,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:09,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:09,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:09,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:09,863 INFO L87 Difference]: Start difference. First operand 2549 states and 6942 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) [2021-03-10 15:03:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:10,458 INFO L93 Difference]: Finished difference Result 3717 states and 9506 transitions. [2021-03-10 15:03:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:03:10,458 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 114 [2021-03-10 15:03:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:10,463 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:10,463 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:10,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 550.0ms TimeCoverageRelationStatistics Valid=794, Invalid=2286, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 15:03:10,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2649. [2021-03-10 15:03:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.734894259818731) internal successors, (7242), 2648 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 7242 transitions. [2021-03-10 15:03:10,495 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 7242 transitions. Word has length 114 [2021-03-10 15:03:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:10,495 INFO L480 AbstractCegarLoop]: Abstraction has 2649 states and 7242 transitions. [2021-03-10 15:03:10,495 INFO L481 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) [2021-03-10 15:03:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 7242 transitions. [2021-03-10 15:03:10,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:10,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:10,497 INFO L519 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] [2021-03-10 15:03:10,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 15:03:10,698 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:10,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:10,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2116795085, now seen corresponding path program 100 times [2021-03-10 15:03:10,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:10,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039368516] [2021-03-10 15:03:10,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039368516] [2021-03-10 15:03:10,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428447579] [2021-03-10 15:03:10,861 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 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 [2021-03-10 15:03:10,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:03:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:10,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:10,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:11,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:11,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:11,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944747221] [2021-03-10 15:03:11,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:11,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:11,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:11,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:11,074 INFO L87 Difference]: Start difference. First operand 2649 states and 7242 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) [2021-03-10 15:03:11,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:11,703 INFO L93 Difference]: Finished difference Result 3717 states and 9606 transitions. [2021-03-10 15:03:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 15:03:11,703 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 114 [2021-03-10 15:03:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:11,707 INFO L225 Difference]: With dead ends: 3717 [2021-03-10 15:03:11,707 INFO L226 Difference]: Without dead ends: 3447 [2021-03-10 15:03:11,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 15:03:11,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3447 states. [2021-03-10 15:03:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3447 to 2749. [2021-03-10 15:03:11,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.7445414847161573) internal successors, (7542), 2748 states have internal predecessors, (7542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7542 transitions. [2021-03-10 15:03:11,738 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7542 transitions. Word has length 114 [2021-03-10 15:03:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:11,738 INFO L480 AbstractCegarLoop]: Abstraction has 2749 states and 7542 transitions. [2021-03-10 15:03:11,738 INFO L481 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) [2021-03-10 15:03:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7542 transitions. [2021-03-10 15:03:11,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:11,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:11,741 INFO L519 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] [2021-03-10 15:03:11,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-10 15:03:11,941 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1840468683, now seen corresponding path program 101 times [2021-03-10 15:03:11,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:11,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360468623] [2021-03-10 15:03:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:12,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360468623] [2021-03-10 15:03:12,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430269579] [2021-03-10 15:03:12,105 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 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 [2021-03-10 15:03:12,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 15:03:12,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:12,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2021-03-10 15:03:12,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:12,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:12,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-03-10 15:03:12,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703641936] [2021-03-10 15:03:12,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 15:03:12,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:12,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 15:03:12,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:03:12,297 INFO L87 Difference]: Start difference. First operand 2749 states and 7542 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) [2021-03-10 15:03:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:12,990 INFO L93 Difference]: Finished difference Result 4465 states and 11758 transitions. [2021-03-10 15:03:12,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 15:03:12,990 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 114 [2021-03-10 15:03:12,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:12,995 INFO L225 Difference]: With dead ends: 4465 [2021-03-10 15:03:12,995 INFO L226 Difference]: Without dead ends: 4195 [2021-03-10 15:03:12,995 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=1017, Invalid=2523, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 15:03:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-03-10 15:03:13,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2924. [2021-03-10 15:03:13,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2924 states, 2923 states have (on average 2.770441327403353) internal successors, (8098), 2923 states have internal predecessors, (8098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2924 states to 2924 states and 8098 transitions. [2021-03-10 15:03:13,028 INFO L78 Accepts]: Start accepts. Automaton has 2924 states and 8098 transitions. Word has length 114 [2021-03-10 15:03:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:13,028 INFO L480 AbstractCegarLoop]: Abstraction has 2924 states and 8098 transitions. [2021-03-10 15:03:13,028 INFO L481 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) [2021-03-10 15:03:13,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2924 states and 8098 transitions. [2021-03-10 15:03:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-03-10 15:03:13,030 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:13,030 INFO L519 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] [2021-03-10 15:03:13,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 15:03:13,231 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:13,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1794925873, now seen corresponding path program 102 times [2021-03-10 15:03:13,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:13,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485621808] [2021-03-10 15:03:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:13,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485621808] [2021-03-10 15:03:13,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587632320] [2021-03-10 15:03:13,394 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 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 [2021-03-10 15:03:13,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 15:03:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:13,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:13,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:13,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-03-10 15:03:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473461685] [2021-03-10 15:03:13,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 15:03:13,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:13,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 15:03:13,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:03:13,603 INFO L87 Difference]: Start difference. First operand 2924 states and 8098 transitions. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:14,374 INFO L93 Difference]: Finished difference Result 3863 states and 10216 transitions. [2021-03-10 15:03:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 15:03:14,375 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 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 114 [2021-03-10 15:03:14,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:14,379 INFO L225 Difference]: With dead ends: 3863 [2021-03-10 15:03:14,379 INFO L226 Difference]: Without dead ends: 3452 [2021-03-10 15:03:14,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=963, Invalid=2819, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 15:03:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3452 states. [2021-03-10 15:03:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3452 to 2074. [2021-03-10 15:03:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.673420164013507) internal successors, (5542), 2073 states have internal predecessors, (5542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5542 transitions. [2021-03-10 15:03:14,403 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5542 transitions. Word has length 114 [2021-03-10 15:03:14,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:14,403 INFO L480 AbstractCegarLoop]: Abstraction has 2074 states and 5542 transitions. [2021-03-10 15:03:14,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 24 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5542 transitions. [2021-03-10 15:03:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:14,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:14,405 INFO L519 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] [2021-03-10 15:03:14,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:14,612 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 905668596, now seen corresponding path program 103 times [2021-03-10 15:03:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:14,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589053004] [2021-03-10 15:03:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589053004] [2021-03-10 15:03:14,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240426401] [2021-03-10 15:03:14,830 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 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 [2021-03-10 15:03:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:14,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:15,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:15,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:15,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972025181] [2021-03-10 15:03:15,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:15,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:15,050 INFO L87 Difference]: Start difference. First operand 2074 states and 5542 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:15,466 INFO L93 Difference]: Finished difference Result 3367 states and 8306 transitions. [2021-03-10 15:03:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 15:03:15,467 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:15,470 INFO L225 Difference]: With dead ends: 3367 [2021-03-10 15:03:15,471 INFO L226 Difference]: Without dead ends: 3097 [2021-03-10 15:03:15,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 480.8ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 15:03:15,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2021-03-10 15:03:15,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 2124. [2021-03-10 15:03:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 2123 states have (on average 2.6811116344795103) internal successors, (5692), 2123 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 5692 transitions. [2021-03-10 15:03:15,494 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 5692 transitions. Word has length 119 [2021-03-10 15:03:15,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:15,494 INFO L480 AbstractCegarLoop]: Abstraction has 2124 states and 5692 transitions. [2021-03-10 15:03:15,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:15,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 5692 transitions. [2021-03-10 15:03:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:15,496 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:15,496 INFO L519 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] [2021-03-10 15:03:15,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 15:03:15,697 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1738958478, now seen corresponding path program 104 times [2021-03-10 15:03:15,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:15,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404445855] [2021-03-10 15:03:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404445855] [2021-03-10 15:03:15,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334858033] [2021-03-10 15:03:15,915 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 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 [2021-03-10 15:03:15,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:03:15,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:15,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:15,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:16,145 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:16,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:16,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:16,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702730294] [2021-03-10 15:03:16,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:16,146 INFO L87 Difference]: Start difference. First operand 2124 states and 5692 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:16,594 INFO L93 Difference]: Finished difference Result 3842 states and 9356 transitions. [2021-03-10 15:03:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 15:03:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:16,598 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:16,598 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:16,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 15:03:16,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:16,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2224. [2021-03-10 15:03:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2224 states, 2223 states have (on average 2.6954565901934324) internal successors, (5992), 2223 states have internal predecessors, (5992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 5992 transitions. [2021-03-10 15:03:16,625 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 5992 transitions. Word has length 119 [2021-03-10 15:03:16,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:16,625 INFO L480 AbstractCegarLoop]: Abstraction has 2224 states and 5992 transitions. [2021-03-10 15:03:16,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 5992 transitions. [2021-03-10 15:03:16,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:16,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:16,627 INFO L519 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] [2021-03-10 15:03:16,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:16,828 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 230813808, now seen corresponding path program 105 times [2021-03-10 15:03:16,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:16,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812726703] [2021-03-10 15:03:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:17,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812726703] [2021-03-10 15:03:17,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662107049] [2021-03-10 15:03:17,028 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 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 [2021-03-10 15:03:17,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 15:03:17,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:17,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2021-03-10 15:03:17,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:17,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:17,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401552701] [2021-03-10 15:03:17,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:17,249 INFO L87 Difference]: Start difference. First operand 2224 states and 5992 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:17,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:17,755 INFO L93 Difference]: Finished difference Result 3842 states and 9456 transitions. [2021-03-10 15:03:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 15:03:17,756 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:17,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:17,760 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:17,760 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:17,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 15:03:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:17,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2324. [2021-03-10 15:03:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7085665088247954) internal successors, (6292), 2323 states have internal predecessors, (6292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6292 transitions. [2021-03-10 15:03:17,784 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6292 transitions. Word has length 119 [2021-03-10 15:03:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:17,784 INFO L480 AbstractCegarLoop]: Abstraction has 2324 states and 6292 transitions. [2021-03-10 15:03:17,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6292 transitions. [2021-03-10 15:03:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:17,786 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:17,786 INFO L519 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] [2021-03-10 15:03:17,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 15:03:17,987 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:17,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1920238, now seen corresponding path program 106 times [2021-03-10 15:03:17,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:17,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851358287] [2021-03-10 15:03:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:18,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851358287] [2021-03-10 15:03:18,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105552640] [2021-03-10 15:03:18,181 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 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 [2021-03-10 15:03:18,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:03:18,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:18,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:18,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:18,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928995207] [2021-03-10 15:03:18,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:18,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:18,411 INFO L87 Difference]: Start difference. First operand 2324 states and 6292 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:18,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:18,941 INFO L93 Difference]: Finished difference Result 3842 states and 9556 transitions. [2021-03-10 15:03:18,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 15:03:18,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:18,945 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:18,945 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:18,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 15:03:18,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:18,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2424. [2021-03-10 15:03:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2424 states, 2423 states have (on average 2.720594304581098) internal successors, (6592), 2423 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2424 states to 2424 states and 6592 transitions. [2021-03-10 15:03:18,972 INFO L78 Accepts]: Start accepts. Automaton has 2424 states and 6592 transitions. Word has length 119 [2021-03-10 15:03:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:18,972 INFO L480 AbstractCegarLoop]: Abstraction has 2424 states and 6592 transitions. [2021-03-10 15:03:18,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2424 states and 6592 transitions. [2021-03-10 15:03:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:18,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:18,974 INFO L519 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] [2021-03-10 15:03:19,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 15:03:19,175 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:19,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:19,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1662218516, now seen corresponding path program 107 times [2021-03-10 15:03:19,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:19,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410836712] [2021-03-10 15:03:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:19,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410836712] [2021-03-10 15:03:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928307918] [2021-03-10 15:03:19,362 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 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 [2021-03-10 15:03:19,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-03-10 15:03:19,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:19,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:19,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:19,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337311526] [2021-03-10 15:03:19,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:19,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:19,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:19,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:19,578 INFO L87 Difference]: Start difference. First operand 2424 states and 6592 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:20,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:20,143 INFO L93 Difference]: Finished difference Result 3842 states and 9656 transitions. [2021-03-10 15:03:20,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 15:03:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:20,147 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:20,148 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:20,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 579.8ms TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 15:03:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2524. [2021-03-10 15:03:20,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.7316686484344035) internal successors, (6892), 2523 states have internal predecessors, (6892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6892 transitions. [2021-03-10 15:03:20,191 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6892 transitions. Word has length 119 [2021-03-10 15:03:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:20,191 INFO L480 AbstractCegarLoop]: Abstraction has 2524 states and 6892 transitions. [2021-03-10 15:03:20,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6892 transitions. [2021-03-10 15:03:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:20,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:20,193 INFO L519 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] [2021-03-10 15:03:20,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 15:03:20,394 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash -213346710, now seen corresponding path program 108 times [2021-03-10 15:03:20,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:20,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94178715] [2021-03-10 15:03:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:20,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94178715] [2021-03-10 15:03:20,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576165957] [2021-03-10 15:03:20,577 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 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 [2021-03-10 15:03:20,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 15:03:20,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:20,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 15:03:20,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:20,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:20,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:20,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411505659] [2021-03-10 15:03:20,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:20,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:20,793 INFO L87 Difference]: Start difference. First operand 2524 states and 6892 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:21,397 INFO L93 Difference]: Finished difference Result 3842 states and 9756 transitions. [2021-03-10 15:03:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 15:03:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:21,401 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:21,401 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:21,402 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 591.7ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 15:03:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:21,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2624. [2021-03-10 15:03:21,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2624 states, 2623 states have (on average 2.741898589401449) internal successors, (7192), 2623 states have internal predecessors, (7192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:21,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2624 states to 2624 states and 7192 transitions. [2021-03-10 15:03:21,431 INFO L78 Accepts]: Start accepts. Automaton has 2624 states and 7192 transitions. Word has length 119 [2021-03-10 15:03:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:21,431 INFO L480 AbstractCegarLoop]: Abstraction has 2624 states and 7192 transitions. [2021-03-10 15:03:21,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:21,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2624 states and 7192 transitions. [2021-03-10 15:03:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:21,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:21,433 INFO L519 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] [2021-03-10 15:03:21,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:21,634 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:21,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1847442584, now seen corresponding path program 109 times [2021-03-10 15:03:21,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:21,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470048354] [2021-03-10 15:03:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470048354] [2021-03-10 15:03:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794107776] [2021-03-10 15:03:21,831 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 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 [2021-03-10 15:03:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:22,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036004266] [2021-03-10 15:03:22,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:22,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:22,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:22,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:22,042 INFO L87 Difference]: Start difference. First operand 2624 states and 7192 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:22,679 INFO L93 Difference]: Finished difference Result 3842 states and 9856 transitions. [2021-03-10 15:03:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 15:03:22,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:22,684 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:22,684 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:22,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 15:03:22,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2724. [2021-03-10 15:03:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2724 states, 2723 states have (on average 2.7513771575468233) internal successors, (7492), 2723 states have internal predecessors, (7492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:22,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2724 states to 2724 states and 7492 transitions. [2021-03-10 15:03:22,715 INFO L78 Accepts]: Start accepts. Automaton has 2724 states and 7492 transitions. Word has length 119 [2021-03-10 15:03:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:22,716 INFO L480 AbstractCegarLoop]: Abstraction has 2724 states and 7492 transitions. [2021-03-10 15:03:22,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2724 states and 7492 transitions. [2021-03-10 15:03:22,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:22,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:22,718 INFO L519 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] [2021-03-10 15:03:22,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:22,918 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:22,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1526565402, now seen corresponding path program 110 times [2021-03-10 15:03:22,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:22,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81883856] [2021-03-10 15:03:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:23,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81883856] [2021-03-10 15:03:23,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346624298] [2021-03-10 15:03:23,103 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 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 [2021-03-10 15:03:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:03:23,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:23,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:23,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:23,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:23,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:23,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771490165] [2021-03-10 15:03:23,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:23,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:23,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:23,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:23,325 INFO L87 Difference]: Start difference. First operand 2724 states and 7492 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:24,001 INFO L93 Difference]: Finished difference Result 3842 states and 9956 transitions. [2021-03-10 15:03:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 15:03:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:24,005 INFO L225 Difference]: With dead ends: 3842 [2021-03-10 15:03:24,005 INFO L226 Difference]: Without dead ends: 3572 [2021-03-10 15:03:24,006 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 15:03:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3572 states. [2021-03-10 15:03:24,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3572 to 2824. [2021-03-10 15:03:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2824 states, 2823 states have (on average 2.7601842012043925) internal successors, (7792), 2823 states have internal predecessors, (7792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:24,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 7792 transitions. [2021-03-10 15:03:24,040 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 7792 transitions. Word has length 119 [2021-03-10 15:03:24,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:24,040 INFO L480 AbstractCegarLoop]: Abstraction has 2824 states and 7792 transitions. [2021-03-10 15:03:24,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 7792 transitions. [2021-03-10 15:03:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:24,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:24,042 INFO L519 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] [2021-03-10 15:03:24,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:03:24,242 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:24,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1802891804, now seen corresponding path program 111 times [2021-03-10 15:03:24,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:24,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475054993] [2021-03-10 15:03:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:24,423 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475054993] [2021-03-10 15:03:24,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839434883] [2021-03-10 15:03:24,423 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 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 [2021-03-10 15:03:24,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-03-10 15:03:24,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:24,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-10 15:03:24,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:24,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:24,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:24,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986962882] [2021-03-10 15:03:24,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:24,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:24,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:24,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:24,659 INFO L87 Difference]: Start difference. First operand 2824 states and 7792 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:25,382 INFO L93 Difference]: Finished difference Result 4565 states and 12058 transitions. [2021-03-10 15:03:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 15:03:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:25,388 INFO L225 Difference]: With dead ends: 4565 [2021-03-10 15:03:25,389 INFO L226 Difference]: Without dead ends: 4295 [2021-03-10 15:03:25,389 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 683.1ms TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 15:03:25,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4295 states. [2021-03-10 15:03:25,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4295 to 2999. [2021-03-10 15:03:25,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2999 states, 2998 states have (on average 2.7845230153435625) internal successors, (8348), 2998 states have internal predecessors, (8348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2999 states to 2999 states and 8348 transitions. [2021-03-10 15:03:25,424 INFO L78 Accepts]: Start accepts. Automaton has 2999 states and 8348 transitions. Word has length 119 [2021-03-10 15:03:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:25,424 INFO L480 AbstractCegarLoop]: Abstraction has 2999 states and 8348 transitions. [2021-03-10 15:03:25,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2999 states and 8348 transitions. [2021-03-10 15:03:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-03-10 15:03:25,426 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:25,426 INFO L519 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] [2021-03-10 15:03:25,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 15:03:25,627 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1143319064, now seen corresponding path program 112 times [2021-03-10 15:03:25,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:25,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305792232] [2021-03-10 15:03:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:03:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305792232] [2021-03-10 15:03:25,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158250471] [2021-03-10 15:03:25,802 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 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 [2021-03-10 15:03:25,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:03:25,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:03:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 15:03:25,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:03:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:03:26,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:03:26,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-03-10 15:03:26,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437765160] [2021-03-10 15:03:26,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 15:03:26,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:03:26,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 15:03:26,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:03:26,011 INFO L87 Difference]: Start difference. First operand 2999 states and 8348 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:26,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:03:26,874 INFO L93 Difference]: Finished difference Result 3938 states and 10466 transitions. [2021-03-10 15:03:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 15:03:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 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 119 [2021-03-10 15:03:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:03:26,878 INFO L225 Difference]: With dead ends: 3938 [2021-03-10 15:03:26,878 INFO L226 Difference]: Without dead ends: 3527 [2021-03-10 15:03:26,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 822.8ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 15:03:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-03-10 15:03:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2013. [2021-03-10 15:03:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.675944333996024) internal successors, (5384), 2012 states have internal predecessors, (5384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:26,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5384 transitions. [2021-03-10 15:03:26,903 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5384 transitions. Word has length 119 [2021-03-10 15:03:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:03:26,903 INFO L480 AbstractCegarLoop]: Abstraction has 2013 states and 5384 transitions. [2021-03-10 15:03:26,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 25 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:03:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5384 transitions. [2021-03-10 15:03:26,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-03-10 15:03:26,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:03:26,905 INFO L519 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] [2021-03-10 15:03:27,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 15:03:27,106 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:03:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:03:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1502798852, now seen corresponding path program 113 times [2021-03-10 15:03:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:03:27,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524775781] [2021-03-10 15:03:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:03:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 15:03:27,113 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 15:03:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 15:03:27,129 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 15:03:27,162 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 15:03:27,162 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 15:03:27,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-03-10 15:03:27,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 03:03:27 BasicIcfg [2021-03-10 15:03:27,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 15:03:27,240 INFO L168 Benchmark]: Toolchain (without parser) took 110374.81 ms. Allocated memory was 255.9 MB in the beginning and 648.0 MB in the end (delta: 392.2 MB). Free memory was 234.9 MB in the beginning and 345.4 MB in the end (delta: -110.5 MB). Peak memory consumption was 280.7 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,240 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 15:03:27,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.98 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 234.0 MB in the beginning and 337.9 MB in the end (delta: -103.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 373.3 MB. Free memory was 337.9 MB in the beginning and 336.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,241 INFO L168 Benchmark]: Boogie Preprocessor took 28.90 ms. Allocated memory is still 373.3 MB. Free memory was 336.2 MB in the beginning and 334.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,241 INFO L168 Benchmark]: RCFGBuilder took 364.31 ms. Allocated memory is still 373.3 MB. Free memory was 334.7 MB in the beginning and 352.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,241 INFO L168 Benchmark]: TraceAbstraction took 109593.47 ms. Allocated memory was 373.3 MB in the beginning and 648.0 MB in the end (delta: 274.7 MB). Free memory was 352.0 MB in the beginning and 345.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 280.0 MB. Max. memory is 16.0 GB. [2021-03-10 15:03:27,241 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 341.98 ms. Allocated memory was 255.9 MB in the beginning and 373.3 MB in the end (delta: 117.4 MB). Free memory was 234.0 MB in the beginning and 337.9 MB in the end (delta: -103.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.23 ms. Allocated memory is still 373.3 MB. Free memory was 337.9 MB in the beginning and 336.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.90 ms. Allocated memory is still 373.3 MB. Free memory was 336.2 MB in the beginning and 334.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 364.31 ms. Allocated memory is still 373.3 MB. Free memory was 334.7 MB in the beginning and 352.0 MB in the end (delta: -17.3 MB). Peak memory consumption was 20.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 109593.47 ms. Allocated memory was 373.3 MB in the beginning and 648.0 MB in the end (delta: 274.7 MB). Free memory was 352.0 MB in the beginning and 345.4 MB in the end (delta: 6.7 MB). Peak memory consumption was 280.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 109430.4ms, OverallIterations: 125, TraceHistogramMax: 10, EmptinessCheckTime: 226.8ms, AutomataDifference: 45300.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 75.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10370 SDtfs, 73563 SDslu, 85170 SDs, 0 SdLazy, 16543 SolverSat, 10970 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8809.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14788 GetRequests, 10138 SyntacticMatches, 0 SemanticMatches, 4650 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47934 ImplicationChecksByTransitivity, 42480.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2999occurred in iteration=123, InterpolantAutomatonStates: 3528, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3096.5ms AutomataMinimizationTime, 124 MinimizatonAttempts, 99008 StatesRemovedByMinimization, 124 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1207.2ms SsaConstructionTime, 2897.1ms SatisfiabilityAnalysisTime, 28941.6ms InterpolantComputationTime, 20584 NumberOfCodeBlocks, 20584 NumberOfCodeBlocksAsserted, 626 NumberOfCheckSat, 20220 ConstructedInterpolants, 0 QuantifiedInterpolants, 83834 SizeOfPredicates, 1614 NumberOfNonLiveVariables, 21688 ConjunctsInSsa, 2285 ConjunctsInUnsatCore, 240 InterpolantComputations, 8 PerfectInterpolantSequences, 0/37928 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...