/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-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 15:00:36,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 15:00:36,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 15:00:36,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 15:00:36,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 15:00:36,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 15:00:36,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 15:00:36,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 15:00:36,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 15:00:36,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 15:00:36,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 15:00:36,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 15:00:36,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 15:00:36,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 15:00:36,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 15:00:36,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 15:00:36,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 15:00:36,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 15:00:36,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 15:00:36,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 15:00:36,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 15:00:36,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 15:00:36,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 15:00:36,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 15:00:36,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 15:00:36,646 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 15:00:36,646 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 15:00:36,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 15:00:36,647 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 15:00:36,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-03-10 15:00:36,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 15:00:36,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 15:00:36,651 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 15:00:36,660 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 15:00:36,686 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 15:00:36,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 15:00:36,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 15:00:36,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 15:00:36,690 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 15:00:36,690 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 15:00:36,690 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 15:00:36,690 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 15:00:36,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 15:00:36,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 15:00:36,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 15:00:36,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 15:00:36,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 15:00:36,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 15:00:36,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 15:00:36,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 15:00:36,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 15:00:36,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 15:00:36,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 15:00:36,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 15:00:36,951 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 15:00:36,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2021-03-10 15:00:37,018 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3920d60d4/701f91c19f634d168faf4cfa0c3146a1/FLAG15ab70e31 [2021-03-10 15:00:37,572 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 15:00:37,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2021-03-10 15:00:37,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3920d60d4/701f91c19f634d168faf4cfa0c3146a1/FLAG15ab70e31 [2021-03-10 15:00:38,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3920d60d4/701f91c19f634d168faf4cfa0c3146a1 [2021-03-10 15:00:38,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 15:00:38,046 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 15:00:38,047 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 15:00:38,047 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 15:00:38,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 15:00:38,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0a040e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38, skipping insertion in model container [2021-03-10 15:00:38,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,057 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 15:00:38,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 15:00:38,312 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-1.i[30950,30963] [2021-03-10 15:00:38,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:00:38,322 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 15:00:38,344 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-1.i[30950,30963] [2021-03-10 15:00:38,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:00:38,392 INFO L208 MainTranslator]: Completed translation [2021-03-10 15:00:38,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38 WrapperNode [2021-03-10 15:00:38,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 15:00:38,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 15:00:38,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 15:00:38,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 15:00:38,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 15:00:38,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 15:00:38,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 15:00:38,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 15:00:38,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (1/1) ... [2021-03-10 15:00:38,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 15:00:38,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 15:00:38,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 15:00:38,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 15:00:38,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (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 15:00:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 15:00:38,520 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 15:00:38,520 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 15:00:38,521 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 15:00:38,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 15:00:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 15:00:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 15:00:38,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 15:00:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 15:00:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 15:00:38,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 15:00:38,523 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 15:00:38,524 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 15:00:38,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 15:00:38,872 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 15:00:38,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:00:38 BoogieIcfgContainer [2021-03-10 15:00:38,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 15:00:38,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 15:00:38,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 15:00:38,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 15:00:38,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 03:00:38" (1/3) ... [2021-03-10 15:00:38,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a69217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:00:38, skipping insertion in model container [2021-03-10 15:00:38,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:00:38" (2/3) ... [2021-03-10 15:00:38,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78a69217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:00:38, skipping insertion in model container [2021-03-10 15:00:38,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:00:38" (3/3) ... [2021-03-10 15:00:38,883 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2021-03-10 15:00:38,888 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 15:00:38,888 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 15:00:38,891 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 15:00:38,892 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 15:00:38,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,909 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,910 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,911 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,915 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,915 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,917 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,918 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,918 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,923 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,924 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,924 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,924 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:00:38,926 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 15:00:38,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 15:00:38,952 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 15:00:38,952 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 15:00:38,952 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 15:00:38,952 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 15:00:38,952 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 15:00:38,953 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 15:00:38,953 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 15:00:38,953 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 15:00:38,959 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 60 transitions, 130 flow [2021-03-10 15:00:39,034 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 15:00:39,040 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 15:00:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 15:00:39,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:39,057 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 15:00:39,057 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:39,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:39,064 INFO L82 PathProgramCache]: Analyzing trace with hash 962891533, now seen corresponding path program 1 times [2021-03-10 15:00:39,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:39,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979494422] [2021-03-10 15:00:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:39,385 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 15:00:39,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979494422] [2021-03-10 15:00:39,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:39,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:00:39,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750314237] [2021-03-10 15:00:39,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:00:39,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:39,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:00:39,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:00:39,409 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 15:00:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:39,577 INFO L93 Difference]: Finished difference Result 3235 states and 9383 transitions. [2021-03-10 15:00:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 15:00:39,584 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 15:00:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:39,606 INFO L225 Difference]: With dead ends: 3235 [2021-03-10 15:00:39,606 INFO L226 Difference]: Without dead ends: 1019 [2021-03-10 15:00:39,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:39,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2021-03-10 15:00:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 759. [2021-03-10 15:00:39,678 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 15:00:39,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2048 transitions. [2021-03-10 15:00:39,681 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2048 transitions. Word has length 26 [2021-03-10 15:00:39,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:39,682 INFO L480 AbstractCegarLoop]: Abstraction has 759 states and 2048 transitions. [2021-03-10 15:00:39,682 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 15:00:39,682 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2048 transitions. [2021-03-10 15:00:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:00:39,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:39,684 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 15:00:39,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 15:00:39,684 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:39,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1660854806, now seen corresponding path program 1 times [2021-03-10 15:00:39,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:39,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168845981] [2021-03-10 15:00:39,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:39,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:39,772 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 15:00:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168845981] [2021-03-10 15:00:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:39,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:00:39,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550832983] [2021-03-10 15:00:39,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:00:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:39,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:00:39,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:00:39,777 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 15:00:39,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:39,886 INFO L93 Difference]: Finished difference Result 1683 states and 4456 transitions. [2021-03-10 15:00:39,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:00:39,887 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 15:00:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:39,894 INFO L225 Difference]: With dead ends: 1683 [2021-03-10 15:00:39,895 INFO L226 Difference]: Without dead ends: 1427 [2021-03-10 15:00:39,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:00:39,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2021-03-10 15:00:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 878. [2021-03-10 15:00:39,929 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 15:00:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2361 transitions. [2021-03-10 15:00:39,932 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2361 transitions. Word has length 30 [2021-03-10 15:00:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:39,933 INFO L480 AbstractCegarLoop]: Abstraction has 878 states and 2361 transitions. [2021-03-10 15:00:39,933 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 15:00:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2361 transitions. [2021-03-10 15:00:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:00:39,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:39,938 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 15:00:39,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 15:00:39,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1932703408, now seen corresponding path program 2 times [2021-03-10 15:00:39,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:39,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962568236] [2021-03-10 15:00:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:40,045 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 15:00:40,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962568236] [2021-03-10 15:00:40,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:40,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:00:40,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135054464] [2021-03-10 15:00:40,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:00:40,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:40,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:00:40,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:00:40,047 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 15:00:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:40,171 INFO L93 Difference]: Finished difference Result 1123 states and 2913 transitions. [2021-03-10 15:00:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:00:40,172 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 15:00:40,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:40,175 INFO L225 Difference]: With dead ends: 1123 [2021-03-10 15:00:40,175 INFO L226 Difference]: Without dead ends: 798 [2021-03-10 15:00:40,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-03-10 15:00:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 698. [2021-03-10 15:00:40,188 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 15:00:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 1846 transitions. [2021-03-10 15:00:40,190 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 1846 transitions. Word has length 30 [2021-03-10 15:00:40,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:40,191 INFO L480 AbstractCegarLoop]: Abstraction has 698 states and 1846 transitions. [2021-03-10 15:00:40,191 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 15:00:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 1846 transitions. [2021-03-10 15:00:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:00:40,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:40,192 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 15:00:40,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 15:00:40,192 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:40,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:40,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1126465904, now seen corresponding path program 1 times [2021-03-10 15:00:40,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:40,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318954102] [2021-03-10 15:00:40,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:40,275 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 15:00:40,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318954102] [2021-03-10 15:00:40,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:40,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:00:40,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129894519] [2021-03-10 15:00:40,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:00:40,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:40,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:00:40,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:00:40,279 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 15:00:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:40,381 INFO L93 Difference]: Finished difference Result 954 states and 2474 transitions. [2021-03-10 15:00:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 15:00:40,381 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 15:00:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:40,384 INFO L225 Difference]: With dead ends: 954 [2021-03-10 15:00:40,384 INFO L226 Difference]: Without dead ends: 738 [2021-03-10 15:00:40,385 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:00:40,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-03-10 15:00:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 682. [2021-03-10 15:00:40,398 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 15:00:40,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1814 transitions. [2021-03-10 15:00:40,402 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1814 transitions. Word has length 30 [2021-03-10 15:00:40,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:40,403 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 1814 transitions. [2021-03-10 15:00:40,404 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 15:00:40,404 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1814 transitions. [2021-03-10 15:00:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:00:40,406 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:40,406 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 15:00:40,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 15:00:40,407 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:40,407 INFO L82 PathProgramCache]: Analyzing trace with hash 815370861, now seen corresponding path program 1 times [2021-03-10 15:00:40,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:40,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610594274] [2021-03-10 15:00:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:40,520 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 15:00:40,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610594274] [2021-03-10 15:00:40,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:40,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 15:00:40,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085378587] [2021-03-10 15:00:40,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 15:00:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 15:00:40,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 15:00:40,523 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 15:00:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:40,623 INFO L93 Difference]: Finished difference Result 1442 states and 3782 transitions. [2021-03-10 15:00:40,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:00:40,623 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 15:00:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:40,629 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 15:00:40,629 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 15:00:40,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 15:00:40,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 727. [2021-03-10 15:00:40,647 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 15:00:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1906 transitions. [2021-03-10 15:00:40,649 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1906 transitions. Word has length 34 [2021-03-10 15:00:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:40,649 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 1906 transitions. [2021-03-10 15:00:40,649 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 15:00:40,650 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1906 transitions. [2021-03-10 15:00:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:00:40,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:40,650 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 15:00:40,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 15:00:40,650 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1916820389, now seen corresponding path program 2 times [2021-03-10 15:00:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:40,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466252499] [2021-03-10 15:00:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:40,729 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 15:00:40,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466252499] [2021-03-10 15:00:40,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:40,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:00:40,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491059987] [2021-03-10 15:00:40,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:00:40,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:40,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:00:40,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:00:40,730 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 15:00:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:40,808 INFO L93 Difference]: Finished difference Result 1881 states and 4916 transitions. [2021-03-10 15:00:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:00:40,808 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 15:00:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:40,815 INFO L225 Difference]: With dead ends: 1881 [2021-03-10 15:00:40,815 INFO L226 Difference]: Without dead ends: 1614 [2021-03-10 15:00:40,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 57.3ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:00:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-03-10 15:00:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 821. [2021-03-10 15:00:40,837 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 15:00:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2221 transitions. [2021-03-10 15:00:40,839 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2221 transitions. Word has length 34 [2021-03-10 15:00:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2221 transitions. [2021-03-10 15:00:40,839 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 15:00:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2221 transitions. [2021-03-10 15:00:40,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:00:40,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:40,840 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 15:00:40,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 15:00:40,840 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:40,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:40,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1894477139, now seen corresponding path program 3 times [2021-03-10 15:00:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:40,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329618888] [2021-03-10 15:00:40,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:40,915 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 15:00:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329618888] [2021-03-10 15:00:40,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:00:40,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:00:40,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899316958] [2021-03-10 15:00:40,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:00:40,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:40,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:00:40,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:00:40,919 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 15:00:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:41,086 INFO L93 Difference]: Finished difference Result 1277 states and 3373 transitions. [2021-03-10 15:00:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 15:00:41,087 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 15:00:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:41,090 INFO L225 Difference]: With dead ends: 1277 [2021-03-10 15:00:41,090 INFO L226 Difference]: Without dead ends: 839 [2021-03-10 15:00:41,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:41,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-03-10 15:00:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 732. [2021-03-10 15:00:41,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.697674418604651) internal successors, (1972), 731 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1972 transitions. [2021-03-10 15:00:41,106 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1972 transitions. Word has length 34 [2021-03-10 15:00:41,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:41,107 INFO L480 AbstractCegarLoop]: Abstraction has 732 states and 1972 transitions. [2021-03-10 15:00:41,107 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 15:00:41,107 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1972 transitions. [2021-03-10 15:00:41,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:00:41,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:41,109 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 15:00:41,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 15:00:41,109 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 583669760, now seen corresponding path program 1 times [2021-03-10 15:00:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:41,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562765856] [2021-03-10 15:00:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:41,213 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 15:00:41,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562765856] [2021-03-10 15:00:41,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685656501] [2021-03-10 15:00:41,213 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 15:00:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:00:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:41,471 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 15:00:41,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:41,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 15:00:41,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944698412] [2021-03-10 15:00:41,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:00:41,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:41,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:00:41,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:00:41,472 INFO L87 Difference]: Start difference. First operand 732 states and 1972 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 15:00:41,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:41,553 INFO L93 Difference]: Finished difference Result 1172 states and 3016 transitions. [2021-03-10 15:00:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:00:41,553 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 15:00:41,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:41,557 INFO L225 Difference]: With dead ends: 1172 [2021-03-10 15:00:41,558 INFO L226 Difference]: Without dead ends: 902 [2021-03-10 15:00:41,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:41,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2021-03-10 15:00:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 819. [2021-03-10 15:00:41,576 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 15:00:41,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2182 transitions. [2021-03-10 15:00:41,578 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2182 transitions. Word has length 39 [2021-03-10 15:00:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:41,578 INFO L480 AbstractCegarLoop]: Abstraction has 819 states and 2182 transitions. [2021-03-10 15:00:41,578 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 15:00:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2182 transitions. [2021-03-10 15:00:41,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:00:41,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:41,579 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 15:00:41,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-03-10 15:00:41,795 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:41,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:41,796 INFO L82 PathProgramCache]: Analyzing trace with hash 454497644, now seen corresponding path program 2 times [2021-03-10 15:00:41,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:41,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198513201] [2021-03-10 15:00:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:41,862 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 15:00:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198513201] [2021-03-10 15:00:41,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365923327] [2021-03-10 15:00:41,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:41,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:00:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:00:41,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:42,024 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 15:00:42,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:42,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 15:00:42,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905652884] [2021-03-10 15:00:42,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 15:00:42,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:42,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 15:00:42,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:00:42,026 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 15:00:42,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:42,146 INFO L93 Difference]: Finished difference Result 2110 states and 5548 transitions. [2021-03-10 15:00:42,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:00:42,146 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 15:00:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:42,153 INFO L225 Difference]: With dead ends: 2110 [2021-03-10 15:00:42,153 INFO L226 Difference]: Without dead ends: 1840 [2021-03-10 15:00:42,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:00:42,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-03-10 15:00:42,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 999. [2021-03-10 15:00:42,180 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 15:00:42,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2748 transitions. [2021-03-10 15:00:42,182 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2748 transitions. Word has length 39 [2021-03-10 15:00:42,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:42,183 INFO L480 AbstractCegarLoop]: Abstraction has 999 states and 2748 transitions. [2021-03-10 15:00:42,184 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 15:00:42,184 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2748 transitions. [2021-03-10 15:00:42,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:00:42,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:42,185 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 15:00:42,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:42,400 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:42,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:42,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1114070384, now seen corresponding path program 3 times [2021-03-10 15:00:42,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:42,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466503285] [2021-03-10 15:00:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:42,473 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 15:00:42,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466503285] [2021-03-10 15:00:42,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088859339] [2021-03-10 15:00:42,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:42,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 15:00:42,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:42,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:00:42,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:42,614 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 15:00:42,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:42,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 15:00:42,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214846856] [2021-03-10 15:00:42,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:00:42,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:00:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:42,617 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 15:00:42,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:42,829 INFO L93 Difference]: Finished difference Result 1814 states and 4746 transitions. [2021-03-10 15:00:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:00:42,829 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 15:00:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:42,834 INFO L225 Difference]: With dead ends: 1814 [2021-03-10 15:00:42,834 INFO L226 Difference]: Without dead ends: 1287 [2021-03-10 15:00:42,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:00:42,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-03-10 15:00:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1009. [2021-03-10 15:00:42,854 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 15:00:42,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2752 transitions. [2021-03-10 15:00:42,856 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2752 transitions. Word has length 39 [2021-03-10 15:00:42,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:42,856 INFO L480 AbstractCegarLoop]: Abstraction has 1009 states and 2752 transitions. [2021-03-10 15:00:42,857 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 15:00:42,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2752 transitions. [2021-03-10 15:00:42,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:00:42,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:42,858 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 15:00:43,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 15:00:43,065 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:43,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 409344372, now seen corresponding path program 1 times [2021-03-10 15:00:43,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:43,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684356643] [2021-03-10 15:00:43,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:43,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:43,159 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 15:00:43,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684356643] [2021-03-10 15:00:43,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740370889] [2021-03-10 15:00:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:43,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:00:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:43,341 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 15:00:43,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:43,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 15:00:43,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222577546] [2021-03-10 15:00:43,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:43,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:43,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:43,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:43,342 INFO L87 Difference]: Start difference. First operand 1009 states and 2752 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 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 15:00:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:43,503 INFO L93 Difference]: Finished difference Result 1749 states and 4552 transitions. [2021-03-10 15:00:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:00:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 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 44 [2021-03-10 15:00:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:43,509 INFO L225 Difference]: With dead ends: 1749 [2021-03-10 15:00:43,509 INFO L226 Difference]: Without dead ends: 1415 [2021-03-10 15:00:43,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:00:43,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-03-10 15:00:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1094. [2021-03-10 15:00:43,530 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 15:00:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 2922 transitions. [2021-03-10 15:00:43,532 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 2922 transitions. Word has length 44 [2021-03-10 15:00:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:43,532 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 2922 transitions. [2021-03-10 15:00:43,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 13 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 15:00:43,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 2922 transitions. [2021-03-10 15:00:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:00:43,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:43,533 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 15:00:43,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:43,746 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1518934498, now seen corresponding path program 2 times [2021-03-10 15:00:43,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:43,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323490591] [2021-03-10 15:00:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:43,808 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 15:00:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323490591] [2021-03-10 15:00:43,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512845436] [2021-03-10 15:00:43,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:43,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:00:43,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:00:43,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:43,961 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 15:00:43,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:43,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:00:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384322825] [2021-03-10 15:00:43,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:00:43,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:00:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:43,964 INFO L87 Difference]: Start difference. First operand 1094 states and 2922 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 15:00:44,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:44,062 INFO L93 Difference]: Finished difference Result 1742 states and 4346 transitions. [2021-03-10 15:00:44,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 15:00:44,062 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 15:00:44,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:44,067 INFO L225 Difference]: With dead ends: 1742 [2021-03-10 15:00:44,067 INFO L226 Difference]: Without dead ends: 1472 [2021-03-10 15:00:44,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:00:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2021-03-10 15:00:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1109. [2021-03-10 15:00:44,087 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 15:00:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 2952 transitions. [2021-03-10 15:00:44,089 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 2952 transitions. Word has length 44 [2021-03-10 15:00:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:44,089 INFO L480 AbstractCegarLoop]: Abstraction has 1109 states and 2952 transitions. [2021-03-10 15:00:44,089 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 15:00:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 2952 transitions. [2021-03-10 15:00:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:00:44,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:44,091 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 15:00:44,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 15:00:44,303 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:44,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:44,304 INFO L82 PathProgramCache]: Analyzing trace with hash -580194750, now seen corresponding path program 3 times [2021-03-10 15:00:44,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:44,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198505960] [2021-03-10 15:00:44,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:44,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:44,354 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 15:00:44,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198505960] [2021-03-10 15:00:44,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915116485] [2021-03-10 15:00:44,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:44,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 15:00:44,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:44,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:00:44,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:44,472 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 15:00:44,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:44,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:00:44,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115297420] [2021-03-10 15:00:44,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:00:44,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:44,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:00:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:44,474 INFO L87 Difference]: Start difference. First operand 1109 states and 2952 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 15:00:44,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:44,634 INFO L93 Difference]: Finished difference Result 2425 states and 6308 transitions. [2021-03-10 15:00:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:00:44,634 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 15:00:44,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:44,654 INFO L225 Difference]: With dead ends: 2425 [2021-03-10 15:00:44,654 INFO L226 Difference]: Without dead ends: 2155 [2021-03-10 15:00:44,655 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:00:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-10 15:00:44,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1234. [2021-03-10 15:00:44,690 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 15:00:44,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3348 transitions. [2021-03-10 15:00:44,693 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3348 transitions. Word has length 44 [2021-03-10 15:00:44,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:44,693 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 3348 transitions. [2021-03-10 15:00:44,694 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 15:00:44,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3348 transitions. [2021-03-10 15:00:44,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:00:44,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:44,695 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 15:00:44,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:44,912 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:44,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash 79377990, now seen corresponding path program 4 times [2021-03-10 15:00:44,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:44,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198295564] [2021-03-10 15:00:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:44,982 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 15:00:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198295564] [2021-03-10 15:00:44,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439020825] [2021-03-10 15:00:44,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:45,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:00:45,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:45,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:00:45,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:45,128 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 15:00:45,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:45,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:00:45,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141929065] [2021-03-10 15:00:45,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:00:45,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:45,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:00:45,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:00:45,130 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 15:00:45,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:45,334 INFO L93 Difference]: Finished difference Result 1823 states and 4766 transitions. [2021-03-10 15:00:45,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:00:45,335 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 15:00:45,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:45,338 INFO L225 Difference]: With dead ends: 1823 [2021-03-10 15:00:45,338 INFO L226 Difference]: Without dead ends: 1352 [2021-03-10 15:00:45,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:00:45,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-03-10 15:00:45,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1024. [2021-03-10 15:00:45,354 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 15:00:45,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2742 transitions. [2021-03-10 15:00:45,356 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2742 transitions. Word has length 44 [2021-03-10 15:00:45,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:45,356 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2742 transitions. [2021-03-10 15:00:45,356 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 15:00:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2742 transitions. [2021-03-10 15:00:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:00:45,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:45,357 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 15:00:45,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 15:00:45,573 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:45,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:45,574 INFO L82 PathProgramCache]: Analyzing trace with hash -800989155, now seen corresponding path program 5 times [2021-03-10 15:00:45,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:45,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183871424] [2021-03-10 15:00:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:45,634 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 15:00:45,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183871424] [2021-03-10 15:00:45,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457990841] [2021-03-10 15:00:45,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:45,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 15:00:45,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:45,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:00:45,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:45,788 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 15:00:45,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:45,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:00:45,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652894746] [2021-03-10 15:00:45,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:00:45,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:45,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:00:45,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:00:45,790 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 15:00:45,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:45,921 INFO L93 Difference]: Finished difference Result 1617 states and 4106 transitions. [2021-03-10 15:00:45,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:00:45,921 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 15:00:45,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:45,924 INFO L225 Difference]: With dead ends: 1617 [2021-03-10 15:00:45,924 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 15:00:45,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:00:45,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 15:00:45,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1074. [2021-03-10 15:00:45,941 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 15:00:45,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2892 transitions. [2021-03-10 15:00:45,943 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2892 transitions. Word has length 49 [2021-03-10 15:00:45,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:45,944 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 2892 transitions. [2021-03-10 15:00:45,944 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 15:00:45,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2892 transitions. [2021-03-10 15:00:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:00:45,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:45,961 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 15:00:46,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 15:00:46,177 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1077315557, now seen corresponding path program 6 times [2021-03-10 15:00:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:46,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390783092] [2021-03-10 15:00:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:46,232 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 15:00:46,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390783092] [2021-03-10 15:00:46,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227237137] [2021-03-10 15:00:46,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:46,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 15:00:46,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:00:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:46,382 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 15:00:46,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:46,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:00:46,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863381209] [2021-03-10 15:00:46,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:00:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:46,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:00:46,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:00:46,383 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 15:00:46,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:46,548 INFO L93 Difference]: Finished difference Result 2465 states and 6458 transitions. [2021-03-10 15:00:46,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:00:46,548 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 15:00:46,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:46,552 INFO L225 Difference]: With dead ends: 2465 [2021-03-10 15:00:46,552 INFO L226 Difference]: Without dead ends: 2195 [2021-03-10 15:00:46,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:00:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-03-10 15:00:46,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1249. [2021-03-10 15:00:46,574 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 15:00:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3448 transitions. [2021-03-10 15:00:46,577 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3448 transitions. Word has length 49 [2021-03-10 15:00:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:46,577 INFO L480 AbstractCegarLoop]: Abstraction has 1249 states and 3448 transitions. [2021-03-10 15:00:46,577 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 15:00:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3448 transitions. [2021-03-10 15:00:46,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:00:46,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:46,578 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 15:00:46,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 15:00:46,791 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:46,792 INFO L82 PathProgramCache]: Analyzing trace with hash -417742817, now seen corresponding path program 7 times [2021-03-10 15:00:46,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:46,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103788627] [2021-03-10 15:00:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:46,846 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 15:00:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103788627] [2021-03-10 15:00:46,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661296143] [2021-03-10 15:00:46,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:46,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:00:46,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:46,975 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 15:00:46,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:46,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 15:00:46,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677707033] [2021-03-10 15:00:46,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:00:46,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:46,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:00:46,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:00:46,976 INFO L87 Difference]: Start difference. First operand 1249 states and 3448 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:47,248 INFO L93 Difference]: Finished difference Result 2219 states and 5806 transitions. [2021-03-10 15:00:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:00:47,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:00:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:47,252 INFO L225 Difference]: With dead ends: 2219 [2021-03-10 15:00:47,252 INFO L226 Difference]: Without dead ends: 1692 [2021-03-10 15:00:47,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:00:47,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-03-10 15:00:47,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1259. [2021-03-10 15:00:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1258 states have (on average 2.7440381558028615) internal successors, (3452), 1258 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:47,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 3452 transitions. [2021-03-10 15:00:47,274 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 3452 transitions. Word has length 49 [2021-03-10 15:00:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:47,274 INFO L480 AbstractCegarLoop]: Abstraction has 1259 states and 3452 transitions. [2021-03-10 15:00:47,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:47,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 3452 transitions. [2021-03-10 15:00:47,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:00:47,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:47,293 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 15:00:47,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 15:00:47,509 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:47,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:47,510 INFO L82 PathProgramCache]: Analyzing trace with hash -255755739, now seen corresponding path program 8 times [2021-03-10 15:00:47,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:47,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241551903] [2021-03-10 15:00:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:47,595 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 15:00:47,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241551903] [2021-03-10 15:00:47,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140825732] [2021-03-10 15:00:47,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:47,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:00:47,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:47,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:00:47,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:47,762 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 15:00:47,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:47,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 15:00:47,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594947211] [2021-03-10 15:00:47,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:47,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:47,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:47,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:47,764 INFO L87 Difference]: Start difference. First operand 1259 states and 3452 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 15:00:47,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:47,954 INFO L93 Difference]: Finished difference Result 2049 states and 5352 transitions. [2021-03-10 15:00:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:00:47,954 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 15:00:47,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:47,958 INFO L225 Difference]: With dead ends: 2049 [2021-03-10 15:00:47,958 INFO L226 Difference]: Without dead ends: 1715 [2021-03-10 15:00:47,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-03-10 15:00:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-10 15:00:47,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-03-10 15:00:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1343 states have (on average 2.696947133283693) internal successors, (3622), 1343 states have internal predecessors, (3622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3622 transitions. [2021-03-10 15:00:47,979 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3622 transitions. Word has length 54 [2021-03-10 15:00:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:47,979 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 3622 transitions. [2021-03-10 15:00:47,979 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 15:00:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3622 transitions. [2021-03-10 15:00:47,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:00:47,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:47,981 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 15:00:48,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 15:00:48,195 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash 493439251, now seen corresponding path program 9 times [2021-03-10 15:00:48,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:48,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74865160] [2021-03-10 15:00:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:48,284 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 15:00:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74865160] [2021-03-10 15:00:48,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380157958] [2021-03-10 15:00:48,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:48,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:00:48,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:00:48,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:48,432 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 15:00:48,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:48,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:00:48,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858794718] [2021-03-10 15:00:48,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:00:48,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:48,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:00:48,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:00:48,433 INFO L87 Difference]: Start difference. First operand 1344 states and 3622 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 15:00:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:48,545 INFO L93 Difference]: Finished difference Result 2142 states and 5346 transitions. [2021-03-10 15:00:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:00:48,546 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 15:00:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:48,549 INFO L225 Difference]: With dead ends: 2142 [2021-03-10 15:00:48,549 INFO L226 Difference]: Without dead ends: 1872 [2021-03-10 15:00:48,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 15:00:48,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-03-10 15:00:48,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1359. [2021-03-10 15:00:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.6892488954344627) internal successors, (3652), 1358 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-03-10 15:00:48,573 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-03-10 15:00:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:48,573 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-03-10 15:00:48,573 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 15:00:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-03-10 15:00:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:00:48,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:48,577 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 15:00:48,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:48,789 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1960125811, now seen corresponding path program 10 times [2021-03-10 15:00:48,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:48,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314755736] [2021-03-10 15:00:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:48,879 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 15:00:48,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314755736] [2021-03-10 15:00:48,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194111297] [2021-03-10 15:00:48,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:48,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:00:48,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:48,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:00:48,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:00:49,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:00:49,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89835232] [2021-03-10 15:00:49,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:00:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:00:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:00:49,019 INFO L87 Difference]: Start difference. First operand 1359 states and 3652 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 15:00:49,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:49,195 INFO L93 Difference]: Finished difference Result 2027 states and 5116 transitions. [2021-03-10 15:00:49,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:00:49,195 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 15:00:49,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:49,198 INFO L225 Difference]: With dead ends: 2027 [2021-03-10 15:00:49,198 INFO L226 Difference]: Without dead ends: 1757 [2021-03-10 15:00:49,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 142.1ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:00:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-03-10 15:00:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1359. [2021-03-10 15:00:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 2.6892488954344627) internal successors, (3652), 1358 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:49,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-03-10 15:00:49,221 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-03-10 15:00:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:49,221 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-03-10 15:00:49,221 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 15:00:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-03-10 15:00:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:00:49,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:49,223 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 15:00:49,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-03-10 15:00:49,438 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:49,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:49,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1683799409, now seen corresponding path program 11 times [2021-03-10 15:00:49,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:49,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849372478] [2021-03-10 15:00:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:49,511 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 15:00:49,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849372478] [2021-03-10 15:00:49,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766574536] [2021-03-10 15:00:49,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:49,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 15:00:49,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:00:49,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:49,640 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 15:00:49,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:49,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:00:49,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233034398] [2021-03-10 15:00:49,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:00:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:00:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:00:49,643 INFO L87 Difference]: Start difference. First operand 1359 states and 3652 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 15:00:49,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:49,817 INFO L93 Difference]: Finished difference Result 2725 states and 7108 transitions. [2021-03-10 15:00:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:00:49,818 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 15:00:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:49,822 INFO L225 Difference]: With dead ends: 2725 [2021-03-10 15:00:49,822 INFO L226 Difference]: Without dead ends: 2455 [2021-03-10 15:00:49,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:00:49,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-03-10 15:00:49,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1484. [2021-03-10 15:00:49,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.729602157788267) internal successors, (4048), 1483 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:49,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4048 transitions. [2021-03-10 15:00:49,857 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4048 transitions. Word has length 54 [2021-03-10 15:00:49,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:49,857 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4048 transitions. [2021-03-10 15:00:49,858 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 15:00:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4048 transitions. [2021-03-10 15:00:49,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:00:49,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:49,861 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 15:00:50,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:50,075 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1951595147, now seen corresponding path program 12 times [2021-03-10 15:00:50,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:50,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036378082] [2021-03-10 15:00:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:50,144 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 15:00:50,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036378082] [2021-03-10 15:00:50,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816861877] [2021-03-10 15:00:50,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:50,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 15:00:50,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:00:50,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:50,286 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 15:00:50,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:50,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 15:00:50,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188890102] [2021-03-10 15:00:50,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:50,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:50,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:50,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:50,287 INFO L87 Difference]: Start difference. First operand 1484 states and 4048 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 15:00:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:50,541 INFO L93 Difference]: Finished difference Result 2459 states and 6366 transitions. [2021-03-10 15:00:50,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:00:50,541 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 15:00:50,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:50,545 INFO L225 Difference]: With dead ends: 2459 [2021-03-10 15:00:50,545 INFO L226 Difference]: Without dead ends: 1932 [2021-03-10 15:00:50,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 222.8ms TimeCoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2021-03-10 15:00:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-03-10 15:00:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1234. [2021-03-10 15:00:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.669910786699108) internal successors, (3292), 1233 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3292 transitions. [2021-03-10 15:00:50,599 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3292 transitions. Word has length 54 [2021-03-10 15:00:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 3292 transitions. [2021-03-10 15:00:50,600 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 15:00:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3292 transitions. [2021-03-10 15:00:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:00:50,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:50,601 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 15:00:50,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 15:00:50,817 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:50,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1556878, now seen corresponding path program 13 times [2021-03-10 15:00:50,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:50,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105688936] [2021-03-10 15:00:50,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:50,894 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 15:00:50,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105688936] [2021-03-10 15:00:50,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707297243] [2021-03-10 15:00:50,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:50,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:00:50,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:51,062 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 15:00:51,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:51,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 15:00:51,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909481194] [2021-03-10 15:00:51,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:51,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:51,063 INFO L87 Difference]: Start difference. First operand 1234 states and 3292 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:51,218 INFO L93 Difference]: Finished difference Result 1927 states and 4856 transitions. [2021-03-10 15:00:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:00:51,218 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 15:00:51,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:51,222 INFO L225 Difference]: With dead ends: 1927 [2021-03-10 15:00:51,222 INFO L226 Difference]: Without dead ends: 1657 [2021-03-10 15:00:51,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:00:51,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-03-10 15:00:51,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1284. [2021-03-10 15:00:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 2.682774746687451) internal successors, (3442), 1283 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 3442 transitions. [2021-03-10 15:00:51,241 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 3442 transitions. Word has length 59 [2021-03-10 15:00:51,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:51,241 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 3442 transitions. [2021-03-10 15:00:51,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 3442 transitions. [2021-03-10 15:00:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:00:51,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:51,243 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 15:00:51,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:51,459 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:51,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash 322434060, now seen corresponding path program 14 times [2021-03-10 15:00:51,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:51,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763785870] [2021-03-10 15:00:51,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:51,529 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 15:00:51,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763785870] [2021-03-10 15:00:51,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483878673] [2021-03-10 15:00:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:51,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:00:51,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:51,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:00:51,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:51,682 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 15:00:51,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:51,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 15:00:51,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520283825] [2021-03-10 15:00:51,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:51,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:51,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:51,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:51,684 INFO L87 Difference]: Start difference. First operand 1284 states and 3442 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:51,869 INFO L93 Difference]: Finished difference Result 2132 states and 5381 transitions. [2021-03-10 15:00:51,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:00:51,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 15:00:51,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:51,873 INFO L225 Difference]: With dead ends: 2132 [2021-03-10 15:00:51,873 INFO L226 Difference]: Without dead ends: 1862 [2021-03-10 15:00:51,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-03-10 15:00:51,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-03-10 15:00:51,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1384. [2021-03-10 15:00:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 2.71294287780188) internal successors, (3752), 1383 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3752 transitions. [2021-03-10 15:00:51,894 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3752 transitions. Word has length 59 [2021-03-10 15:00:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:51,895 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 3752 transitions. [2021-03-10 15:00:51,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3752 transitions. [2021-03-10 15:00:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:00:51,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:51,897 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 15:00:52,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 15:00:52,111 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:52,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:52,112 INFO L82 PathProgramCache]: Analyzing trace with hash 46107658, now seen corresponding path program 15 times [2021-03-10 15:00:52,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:52,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678274239] [2021-03-10 15:00:52,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:52,184 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 15:00:52,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678274239] [2021-03-10 15:00:52,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020353806] [2021-03-10 15:00:52,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:52,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:00:52,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:52,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:00:52,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:52,362 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 15:00:52,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:52,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 15:00:52,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598539936] [2021-03-10 15:00:52,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:52,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:52,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:52,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:52,364 INFO L87 Difference]: Start difference. First operand 1384 states and 3752 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:52,663 INFO L93 Difference]: Finished difference Result 3141 states and 8262 transitions. [2021-03-10 15:00:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:00:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 15:00:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:52,669 INFO L225 Difference]: With dead ends: 3141 [2021-03-10 15:00:52,669 INFO L226 Difference]: Without dead ends: 2660 [2021-03-10 15:00:52,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:00:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-03-10 15:00:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1559. [2021-03-10 15:00:52,693 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 15:00:52,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 4298 transitions. [2021-03-10 15:00:52,696 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 4298 transitions. Word has length 59 [2021-03-10 15:00:52,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:52,696 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 4298 transitions. [2021-03-10 15:00:52,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:52,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 4298 transitions. [2021-03-10 15:00:52,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:00:52,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:52,698 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 15:00:52,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 15:00:52,911 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:52,912 INFO L82 PathProgramCache]: Analyzing trace with hash 705680398, now seen corresponding path program 16 times [2021-03-10 15:00:52,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:52,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286161536] [2021-03-10 15:00:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:52,977 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 15:00:52,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286161536] [2021-03-10 15:00:52,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842323250] [2021-03-10 15:00:52,978 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:53,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:00:53,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:53,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:00:53,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:53,137 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 15:00:53,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:53,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 15:00:53,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301157153] [2021-03-10 15:00:53,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:00:53,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:00:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:00:53,144 INFO L87 Difference]: Start difference. First operand 1559 states and 4298 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:53,476 INFO L93 Difference]: Finished difference Result 2198 states and 5816 transitions. [2021-03-10 15:00:53,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:00:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 15:00:53,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:53,480 INFO L225 Difference]: With dead ends: 2198 [2021-03-10 15:00:53,480 INFO L226 Difference]: Without dead ends: 1787 [2021-03-10 15:00:53,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:00:53,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-03-10 15:00:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1509. [2021-03-10 15:00:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 2.753315649867374) internal successors, (4152), 1508 states have internal predecessors, (4152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 4152 transitions. [2021-03-10 15:00:53,499 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 4152 transitions. Word has length 59 [2021-03-10 15:00:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:53,500 INFO L480 AbstractCegarLoop]: Abstraction has 1509 states and 4152 transitions. [2021-03-10 15:00:53,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 13 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 4152 transitions. [2021-03-10 15:00:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:53,501 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:53,501 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 15:00:53,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 15:00:53,715 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:53,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash 142897558, now seen corresponding path program 17 times [2021-03-10 15:00:53,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:53,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150279660] [2021-03-10 15:00:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:53,809 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 15:00:53,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150279660] [2021-03-10 15:00:53,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387190369] [2021-03-10 15:00:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:53,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 15:00:53,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:53,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:00:53,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:54,065 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 15:00:54,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:54,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-03-10 15:00:54,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43343689] [2021-03-10 15:00:54,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:00:54,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:54,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:00:54,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:00:54,067 INFO L87 Difference]: Start difference. First operand 1509 states and 4152 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 15:00:54,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:54,332 INFO L93 Difference]: Finished difference Result 2349 states and 6152 transitions. [2021-03-10 15:00:54,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:00:54,333 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 15:00:54,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:54,336 INFO L225 Difference]: With dead ends: 2349 [2021-03-10 15:00:54,336 INFO L226 Difference]: Without dead ends: 2015 [2021-03-10 15:00:54,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:00:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-03-10 15:00:54,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1594. [2021-03-10 15:00:54,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 2.7131198995605774) internal successors, (4322), 1593 states have internal predecessors, (4322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4322 transitions. [2021-03-10 15:00:54,360 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4322 transitions. Word has length 64 [2021-03-10 15:00:54,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:54,361 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 4322 transitions. [2021-03-10 15:00:54,361 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 15:00:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4322 transitions. [2021-03-10 15:00:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:54,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:54,362 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 15:00:54,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 15:00:54,571 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:54,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:54,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1155591940, now seen corresponding path program 18 times [2021-03-10 15:00:54,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:54,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581283850] [2021-03-10 15:00:54,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:54,669 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 15:00:54,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581283850] [2021-03-10 15:00:54,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205651648] [2021-03-10 15:00:54,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:54,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:00:54,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:54,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:00:54,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:54,815 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 15:00:54,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:54,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:00:54,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394905496] [2021-03-10 15:00:54,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:54,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:54,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:54,816 INFO L87 Difference]: Start difference. First operand 1594 states and 4322 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 15:00:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:54,980 INFO L93 Difference]: Finished difference Result 2542 states and 6346 transitions. [2021-03-10 15:00:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:00:54,980 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 15:00:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:54,983 INFO L225 Difference]: With dead ends: 2542 [2021-03-10 15:00:54,983 INFO L226 Difference]: Without dead ends: 2272 [2021-03-10 15:00:54,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 154.7ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:00:54,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-03-10 15:00:55,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1609. [2021-03-10 15:00:55,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:55,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:00:55,006 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:00:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:55,006 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:00:55,006 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 15:00:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:00:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:55,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:55,009 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 15:00:55,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 15:00:55,223 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:55,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:55,224 INFO L82 PathProgramCache]: Analyzing trace with hash -236137628, now seen corresponding path program 19 times [2021-03-10 15:00:55,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:55,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428441870] [2021-03-10 15:00:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:55,302 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 15:00:55,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428441870] [2021-03-10 15:00:55,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020604539] [2021-03-10 15:00:55,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:55,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:55,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:00:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:55,446 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 15:00:55,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:55,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:00:55,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861149987] [2021-03-10 15:00:55,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:55,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:55,447 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 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 15:00:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:55,648 INFO L93 Difference]: Finished difference Result 2427 states and 6116 transitions. [2021-03-10 15:00:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:00:55,648 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 15:00:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:55,651 INFO L225 Difference]: With dead ends: 2427 [2021-03-10 15:00:55,651 INFO L226 Difference]: Without dead ends: 2157 [2021-03-10 15:00:55,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-03-10 15:00:55,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-03-10 15:00:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1609. [2021-03-10 15:00:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:55,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:00:55,698 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:00:55,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:55,699 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:00:55,699 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 15:00:55,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:00:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:55,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:55,700 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 15:00:55,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:55,915 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:55,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:55,916 INFO L82 PathProgramCache]: Analyzing trace with hash 84739554, now seen corresponding path program 20 times [2021-03-10 15:00:55,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:55,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486509987] [2021-03-10 15:00:55,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:55,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:00:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486509987] [2021-03-10 15:00:55,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960119836] [2021-03-10 15:00:55,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:56,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:00:56,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:00:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:56,136 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 15:00:56,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:56,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:00:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841030412] [2021-03-10 15:00:56,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:56,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:56,137 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 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 15:00:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:56,351 INFO L93 Difference]: Finished difference Result 2327 states and 5916 transitions. [2021-03-10 15:00:56,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:00:56,351 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 15:00:56,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:56,354 INFO L225 Difference]: With dead ends: 2327 [2021-03-10 15:00:56,354 INFO L226 Difference]: Without dead ends: 2057 [2021-03-10 15:00:56,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:00:56,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-03-10 15:00:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1609. [2021-03-10 15:00:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1609 states, 1608 states have (on average 2.7064676616915424) internal successors, (4352), 1608 states have internal predecessors, (4352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:00:56,375 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:00:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:56,375 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:00:56,375 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 15:00:56,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:00:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:56,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:56,377 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 15:00:56,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:56,591 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:56,592 INFO L82 PathProgramCache]: Analyzing trace with hash -191586848, now seen corresponding path program 21 times [2021-03-10 15:00:56,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:56,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724973249] [2021-03-10 15:00:56,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:56,667 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 15:00:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724973249] [2021-03-10 15:00:56,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430009048] [2021-03-10 15:00:56,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:56,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:00:56,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:00:56,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:56,817 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 15:00:56,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:56,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:00:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174180160] [2021-03-10 15:00:56,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:56,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:56,818 INFO L87 Difference]: Start difference. First operand 1609 states and 4352 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 15:00:57,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:57,074 INFO L93 Difference]: Finished difference Result 3281 states and 8612 transitions. [2021-03-10 15:00:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:00:57,074 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 15:00:57,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:57,077 INFO L225 Difference]: With dead ends: 3281 [2021-03-10 15:00:57,077 INFO L226 Difference]: Without dead ends: 2800 [2021-03-10 15:00:57,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:00:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-03-10 15:00:57,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1674. [2021-03-10 15:00:57,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.748356246264196) internal successors, (4598), 1673 states have internal predecessors, (4598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:00:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4598 transitions. [2021-03-10 15:00:57,104 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4598 transitions. Word has length 64 [2021-03-10 15:00:57,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:57,104 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4598 transitions. [2021-03-10 15:00:57,104 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 15:00:57,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4598 transitions. [2021-03-10 15:00:57,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:00:57,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:57,105 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 15:00:57,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:57,319 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:57,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 467985892, now seen corresponding path program 22 times [2021-03-10 15:00:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:57,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008512036] [2021-03-10 15:00:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:57,393 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 15:00:57,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008512036] [2021-03-10 15:00:57,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797429137] [2021-03-10 15:00:57,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:57,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:00:57,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:57,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:00:57,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:57,558 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 15:00:57,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:57,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:00:57,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614759163] [2021-03-10 15:00:57,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:57,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:57,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:57,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:57,560 INFO L87 Difference]: Start difference. First operand 1674 states and 4598 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 15:00:57,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:57,904 INFO L93 Difference]: Finished difference Result 2363 states and 6216 transitions. [2021-03-10 15:00:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:00:57,904 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 15:00:57,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:57,907 INFO L225 Difference]: With dead ends: 2363 [2021-03-10 15:00:57,907 INFO L226 Difference]: Without dead ends: 1952 [2021-03-10 15:00:57,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 281.4ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 15:00:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-03-10 15:00:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1324. [2021-03-10 15:00:57,922 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 15:00:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3542 transitions. [2021-03-10 15:00:57,924 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3542 transitions. Word has length 64 [2021-03-10 15:00:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:57,924 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3542 transitions. [2021-03-10 15:00:57,924 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 15:00:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3542 transitions. [2021-03-10 15:00:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:00:57,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:57,926 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 15:00:58,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-10 15:00:58,142 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash -474265153, now seen corresponding path program 23 times [2021-03-10 15:00:58,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:58,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413975014] [2021-03-10 15:00:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:58,244 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 15:00:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413975014] [2021-03-10 15:00:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207364649] [2021-03-10 15:00:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:58,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 15:00:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:58,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:00:58,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:58,397 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 15:00:58,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:58,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:00:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596709699] [2021-03-10 15:00:58,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:58,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:58,398 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 15:00:58,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:58,600 INFO L93 Difference]: Finished difference Result 2117 states and 5306 transitions. [2021-03-10 15:00:58,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:00:58,601 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 15:00:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:58,603 INFO L225 Difference]: With dead ends: 2117 [2021-03-10 15:00:58,603 INFO L226 Difference]: Without dead ends: 1847 [2021-03-10 15:00:58,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-03-10 15:00:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-03-10 15:00:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1374. [2021-03-10 15:00:58,618 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 15:00:58,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 3692 transitions. [2021-03-10 15:00:58,620 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 3692 transitions. Word has length 69 [2021-03-10 15:00:58,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:58,620 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 3692 transitions. [2021-03-10 15:00:58,620 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 15:00:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 3692 transitions. [2021-03-10 15:00:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:00:58,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:58,622 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 15:00:58,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:58,836 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:58,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:58,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2108361027, now seen corresponding path program 24 times [2021-03-10 15:00:58,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:58,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961290025] [2021-03-10 15:00:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:58,923 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 15:00:58,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961290025] [2021-03-10 15:00:58,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701599651] [2021-03-10 15:00:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:58,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:00:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:00:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:00:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:59,072 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 15:00:59,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:59,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:00:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263976613] [2021-03-10 15:00:59,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:59,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:59,074 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 15:00:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:00:59,315 INFO L93 Difference]: Finished difference Result 2342 states and 5856 transitions. [2021-03-10 15:00:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:00:59,316 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 15:00:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:00:59,318 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:00:59,318 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:00:59,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:00:59,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:00:59,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1474. [2021-03-10 15:00:59,335 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 15:00:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3992 transitions. [2021-03-10 15:00:59,337 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3992 transitions. Word has length 69 [2021-03-10 15:00:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:00:59,337 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3992 transitions. [2021-03-10 15:00:59,337 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 15:00:59,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3992 transitions. [2021-03-10 15:00:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:00:59,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:00:59,339 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 15:00:59,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-10 15:00:59,554 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:00:59,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:00:59,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1787483845, now seen corresponding path program 25 times [2021-03-10 15:00:59,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:00:59,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212444592] [2021-03-10 15:00:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:00:59,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:59,660 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 15:00:59,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212444592] [2021-03-10 15:00:59,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082055666] [2021-03-10 15:00:59,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:00:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:00:59,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:00:59,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:00:59,826 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 15:00:59,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:00:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:00:59,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534046441] [2021-03-10 15:00:59,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:00:59,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:00:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:00:59,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:00:59,827 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 15:01:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:00,073 INFO L93 Difference]: Finished difference Result 2342 states and 5956 transitions. [2021-03-10 15:01:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:00,074 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 15:01:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:00,076 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:01:00,076 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:01:00,077 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 230.4ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:01:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:01:00,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1574. [2021-03-10 15:01:00,095 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 15:01:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 4292 transitions. [2021-03-10 15:01:00,098 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 4292 transitions. Word has length 69 [2021-03-10 15:01:00,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:00,098 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 4292 transitions. [2021-03-10 15:01:00,098 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 15:01:00,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 4292 transitions. [2021-03-10 15:01:00,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:00,100 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:00,100 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 15:01:00,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:00,315 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:00,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:00,316 INFO L82 PathProgramCache]: Analyzing trace with hash -2063810247, now seen corresponding path program 26 times [2021-03-10 15:01:00,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:00,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932406517] [2021-03-10 15:01:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:00,393 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 15:01:00,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932406517] [2021-03-10 15:01:00,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044173902] [2021-03-10 15:01:00,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:00,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:00,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:00,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:01:00,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:00,518 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 15:01:00,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:00,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:00,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108801557] [2021-03-10 15:01:00,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:00,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:00,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:00,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:00,520 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 15:01:00,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:00,801 INFO L93 Difference]: Finished difference Result 3065 states and 8058 transitions. [2021-03-10 15:01:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:00,803 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 15:01:00,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:00,807 INFO L225 Difference]: With dead ends: 3065 [2021-03-10 15:01:00,807 INFO L226 Difference]: Without dead ends: 2795 [2021-03-10 15:01:00,807 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:01:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-03-10 15:01:00,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1749. [2021-03-10 15:01:00,830 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 15:01:00,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4848 transitions. [2021-03-10 15:01:00,832 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4848 transitions. Word has length 69 [2021-03-10 15:01:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:00,833 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4848 transitions. [2021-03-10 15:01:00,833 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 15:01:00,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4848 transitions. [2021-03-10 15:01:00,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:00,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:00,834 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 15:01:01,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 15:01:01,049 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:01,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:01,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1404237507, now seen corresponding path program 27 times [2021-03-10 15:01:01,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:01,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443699132] [2021-03-10 15:01:01,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:01,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:01,170 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 15:01:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443699132] [2021-03-10 15:01:01,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797155851] [2021-03-10 15:01:01,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:01,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:01:01,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:01:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:01,314 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 15:01:01,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:01,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 15:01:01,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955734008] [2021-03-10 15:01:01,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:01,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:01,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:01,316 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 15:01:01,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:01,662 INFO L93 Difference]: Finished difference Result 2438 states and 6466 transitions. [2021-03-10 15:01:01,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:01,662 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 15:01:01,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:01,665 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 15:01:01,665 INFO L226 Difference]: Without dead ends: 2027 [2021-03-10 15:01:01,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:01:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-03-10 15:01:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1263. [2021-03-10 15:01:01,680 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 15:01:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3384 transitions. [2021-03-10 15:01:01,681 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3384 transitions. Word has length 69 [2021-03-10 15:01:01,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:01,682 INFO L480 AbstractCegarLoop]: Abstraction has 1263 states and 3384 transitions. [2021-03-10 15:01:01,682 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 15:01:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3384 transitions. [2021-03-10 15:01:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:01,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:01,683 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 15:01:01,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:01,887 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash 925994951, now seen corresponding path program 28 times [2021-03-10 15:01:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382249194] [2021-03-10 15:01:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:02,015 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 15:01:02,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382249194] [2021-03-10 15:01:02,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905381811] [2021-03-10 15:01:02,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:02,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:02,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:02,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:01:02,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:02,204 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 15:01:02,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:02,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-03-10 15:01:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794153722] [2021-03-10 15:01:02,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 15:01:02,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:02,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 15:01:02,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 15:01:02,205 INFO L87 Difference]: Start difference. First operand 1263 states and 3384 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:02,413 INFO L93 Difference]: Finished difference Result 1833 states and 4652 transitions. [2021-03-10 15:01:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:02,415 INFO L225 Difference]: With dead ends: 1833 [2021-03-10 15:01:02,416 INFO L226 Difference]: Without dead ends: 1563 [2021-03-10 15:01:02,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:01:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2021-03-10 15:01:02,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1348. [2021-03-10 15:01:02,429 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 15:01:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 3554 transitions. [2021-03-10 15:01:02,430 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 3554 transitions. Word has length 74 [2021-03-10 15:01:02,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:02,431 INFO L480 AbstractCegarLoop]: Abstraction has 1348 states and 3554 transitions. [2021-03-10 15:01:02,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:02,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 3554 transitions. [2021-03-10 15:01:02,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:02,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:02,432 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 15:01:02,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 15:01:02,633 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:02,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:02,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1444584373, now seen corresponding path program 29 times [2021-03-10 15:01:02,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:02,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798158971] [2021-03-10 15:01:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:02,740 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 15:01:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798158971] [2021-03-10 15:01:02,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683060823] [2021-03-10 15:01:02,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:01:02,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 15:01:02,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:02,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:01:02,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:02,911 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 15:01:02,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:02,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 15:01:02,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786771011] [2021-03-10 15:01:02,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:02,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:02,912 INFO L87 Difference]: Start difference. First operand 1348 states and 3554 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:03,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:03,101 INFO L93 Difference]: Finished difference Result 2532 states and 6136 transitions. [2021-03-10 15:01:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:01:03,102 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:03,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:03,104 INFO L225 Difference]: With dead ends: 2532 [2021-03-10 15:01:03,104 INFO L226 Difference]: Without dead ends: 2262 [2021-03-10 15:01:03,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-03-10 15:01:03,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-03-10 15:01:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1449. [2021-03-10 15:01:03,122 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 15:01:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 3842 transitions. [2021-03-10 15:01:03,124 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 3842 transitions. Word has length 74 [2021-03-10 15:01:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:03,124 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 3842 transitions. [2021-03-10 15:01:03,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 3842 transitions. [2021-03-10 15:01:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:03,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:03,126 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 15:01:03,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 15:01:03,341 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:03,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:03,341 INFO L82 PathProgramCache]: Analyzing trace with hash -161708011, now seen corresponding path program 30 times [2021-03-10 15:01:03,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:03,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919482847] [2021-03-10 15:01:03,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:03,444 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 15:01:03,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919482847] [2021-03-10 15:01:03,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693798394] [2021-03-10 15:01:03,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:03,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 15:01:03,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:03,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:01:03,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:03,587 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 15:01:03,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:03,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 15:01:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574185815] [2021-03-10 15:01:03,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:03,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:03,588 INFO L87 Difference]: Start difference. First operand 1449 states and 3842 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:03,794 INFO L93 Difference]: Finished difference Result 2517 states and 6206 transitions. [2021-03-10 15:01:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:03,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:03,797 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:01:03,797 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:01:03,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-03-10 15:01:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:01:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1549. [2021-03-10 15:01:03,816 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 15:01:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1549 states to 1549 states and 4142 transitions. [2021-03-10 15:01:03,818 INFO L78 Accepts]: Start accepts. Automaton has 1549 states and 4142 transitions. Word has length 74 [2021-03-10 15:01:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:03,818 INFO L480 AbstractCegarLoop]: Abstraction has 1549 states and 4142 transitions. [2021-03-10 15:01:03,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1549 states and 4142 transitions. [2021-03-10 15:01:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:03,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:03,820 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 15:01:04,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 15:01:04,035 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1795803885, now seen corresponding path program 31 times [2021-03-10 15:01:04,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:04,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350563816] [2021-03-10 15:01:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:04,124 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 15:01:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350563816] [2021-03-10 15:01:04,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556832877] [2021-03-10 15:01:04,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:01:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:04,276 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 15:01:04,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:04,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 15:01:04,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274692324] [2021-03-10 15:01:04,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:04,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:04,277 INFO L87 Difference]: Start difference. First operand 1549 states and 4142 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:04,513 INFO L93 Difference]: Finished difference Result 2517 states and 6306 transitions. [2021-03-10 15:01:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:04,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:04,516 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:01:04,516 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:01:04,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:01:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:01:04,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1649. [2021-03-10 15:01:04,535 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 15:01:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 4442 transitions. [2021-03-10 15:01:04,537 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 4442 transitions. Word has length 74 [2021-03-10 15:01:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:04,537 INFO L480 AbstractCegarLoop]: Abstraction has 1649 states and 4442 transitions. [2021-03-10 15:01:04,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 4442 transitions. [2021-03-10 15:01:04,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:04,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:04,539 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 15:01:04,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-10 15:01:04,739 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1474926703, now seen corresponding path program 32 times [2021-03-10 15:01:04,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:04,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874938011] [2021-03-10 15:01:04,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:04,823 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 15:01:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874938011] [2021-03-10 15:01:04,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912441361] [2021-03-10 15:01:04,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:04,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:04,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:01:04,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:04,980 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 15:01:04,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:04,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 15:01:04,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268925340] [2021-03-10 15:01:04,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:04,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:04,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:04,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:04,981 INFO L87 Difference]: Start difference. First operand 1649 states and 4442 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:05,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:05,257 INFO L93 Difference]: Finished difference Result 2517 states and 6406 transitions. [2021-03-10 15:01:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:05,258 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:05,261 INFO L225 Difference]: With dead ends: 2517 [2021-03-10 15:01:05,261 INFO L226 Difference]: Without dead ends: 2247 [2021-03-10 15:01:05,261 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 15:01:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2247 states. [2021-03-10 15:01:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2247 to 1749. [2021-03-10 15:01:05,280 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 15:01:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4742 transitions. [2021-03-10 15:01:05,282 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4742 transitions. Word has length 74 [2021-03-10 15:01:05,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:05,282 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4742 transitions. [2021-03-10 15:01:05,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:05,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4742 transitions. [2021-03-10 15:01:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:05,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:05,284 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 15:01:05,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:05,487 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:05,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:05,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1751253105, now seen corresponding path program 33 times [2021-03-10 15:01:05,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:05,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312067996] [2021-03-10 15:01:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:05,574 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 15:01:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312067996] [2021-03-10 15:01:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466614816] [2021-03-10 15:01:05,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:05,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 15:01:05,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:05,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:01:05,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:05,715 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 15:01:05,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:05,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-03-10 15:01:05,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616135807] [2021-03-10 15:01:05,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:05,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:05,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:05,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:05,717 INFO L87 Difference]: Start difference. First operand 1749 states and 4742 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:06,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:06,015 INFO L93 Difference]: Finished difference Result 3265 states and 8558 transitions. [2021-03-10 15:01:06,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:06,016 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-03-10 15:01:06,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:06,020 INFO L225 Difference]: With dead ends: 3265 [2021-03-10 15:01:06,020 INFO L226 Difference]: Without dead ends: 2995 [2021-03-10 15:01:06,020 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 15:01:06,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2995 states. [2021-03-10 15:01:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2995 to 1924. [2021-03-10 15:01:06,042 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 15:01:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5298 transitions. [2021-03-10 15:01:06,045 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5298 transitions. Word has length 74 [2021-03-10 15:01:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:06,045 INFO L480 AbstractCegarLoop]: Abstraction has 1924 states and 5298 transitions. [2021-03-10 15:01:06,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5298 transitions. [2021-03-10 15:01:06,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:06,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:06,047 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 15:01:06,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 15:01:06,248 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:06,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1091680365, now seen corresponding path program 34 times [2021-03-10 15:01:06,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:06,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557206648] [2021-03-10 15:01:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:06,331 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 15:01:06,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557206648] [2021-03-10 15:01:06,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085966678] [2021-03-10 15:01:06,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:06,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:06,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:06,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 15:01:06,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:06,488 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 15:01:06,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:06,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 15:01:06,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208691223] [2021-03-10 15:01:06,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 15:01:06,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:06,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 15:01:06,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:01:06,489 INFO L87 Difference]: Start difference. First operand 1924 states and 5298 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 15:01:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:06,881 INFO L93 Difference]: Finished difference Result 2535 states and 6632 transitions. [2021-03-10 15:01:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 15:01:06,881 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 15:01:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:06,884 INFO L225 Difference]: With dead ends: 2535 [2021-03-10 15:01:06,884 INFO L226 Difference]: Without dead ends: 2202 [2021-03-10 15:01:06,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 356.2ms TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 15:01:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2202 states. [2021-03-10 15:01:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2202 to 1854. [2021-03-10 15:01:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1854 states, 1853 states have (on average 2.7344846195358876) internal successors, (5067), 1853 states have internal predecessors, (5067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:06,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1854 states to 1854 states and 5067 transitions. [2021-03-10 15:01:06,905 INFO L78 Accepts]: Start accepts. Automaton has 1854 states and 5067 transitions. Word has length 74 [2021-03-10 15:01:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:06,905 INFO L480 AbstractCegarLoop]: Abstraction has 1854 states and 5067 transitions. [2021-03-10 15:01:06,905 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 15:01:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1854 states and 5067 transitions. [2021-03-10 15:01:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:01:06,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:06,907 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 15:01:07,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-03-10 15:01:07,115 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:07,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:07,115 INFO L82 PathProgramCache]: Analyzing trace with hash -296993115, now seen corresponding path program 35 times [2021-03-10 15:01:07,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:07,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120860284] [2021-03-10 15:01:07,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 81 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:07,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120860284] [2021-03-10 15:01:07,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812170195] [2021-03-10 15:01:07,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:07,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 15:01:07,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:07,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:07,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 15:01:07,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-03-10 15:01:07,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768224522] [2021-03-10 15:01:07,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:07,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:07,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:07,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:07,336 INFO L87 Difference]: Start difference. First operand 1854 states and 5067 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:07,451 INFO L93 Difference]: Finished difference Result 4382 states and 11545 transitions. [2021-03-10 15:01:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:01:07,451 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:01:07,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:07,453 INFO L225 Difference]: With dead ends: 4382 [2021-03-10 15:01:07,453 INFO L226 Difference]: Without dead ends: 1143 [2021-03-10 15:01:07,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:01:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-03-10 15:01:07,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1143. [2021-03-10 15:01:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 2.5569176882661995) internal successors, (2920), 1142 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:07,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 2920 transitions. [2021-03-10 15:01:07,464 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 2920 transitions. Word has length 79 [2021-03-10 15:01:07,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:07,464 INFO L480 AbstractCegarLoop]: Abstraction has 1143 states and 2920 transitions. [2021-03-10 15:01:07,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 2920 transitions. [2021-03-10 15:01:07,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-03-10 15:01:07,466 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:07,466 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 15:01:07,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:07,672 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:07,673 INFO L82 PathProgramCache]: Analyzing trace with hash -698677072, now seen corresponding path program 36 times [2021-03-10 15:01:07,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:07,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153421045] [2021-03-10 15:01:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153421045] [2021-03-10 15:01:07,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883866829] [2021-03-10 15:01:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:07,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 15:01:07,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:07,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:07,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-03-10 15:01:07,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2021-03-10 15:01:07,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503192038] [2021-03-10 15:01:07,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:07,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:07,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:07,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:07,903 INFO L87 Difference]: Start difference. First operand 1143 states and 2920 transitions. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:08,002 INFO L93 Difference]: Finished difference Result 2018 states and 4936 transitions. [2021-03-10 15:01:08,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:01:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have 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 15:01:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:08,002 INFO L225 Difference]: With dead ends: 2018 [2021-03-10 15:01:08,002 INFO L226 Difference]: Without dead ends: 0 [2021-03-10 15:01:08,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:01:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-03-10 15:01:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-03-10 15:01:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:08,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-03-10 15:01:08,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 79 [2021-03-10 15:01:08,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:08,003 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-03-10 15:01:08,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-03-10 15:01:08,003 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-03-10 15:01:08,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-10 15:01:08,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 03:01:08 BasicIcfg [2021-03-10 15:01:08,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 15:01:08,223 INFO L168 Benchmark]: Toolchain (without parser) took 30179.72 ms. Allocated memory was 362.8 MB in the beginning and 784.3 MB in the end (delta: 421.5 MB). Free memory was 325.9 MB in the beginning and 480.1 MB in the end (delta: -154.2 MB). Peak memory consumption was 269.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory was 344.1 MB in the beginning and 344.1 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.61 ms. Allocated memory is still 362.8 MB. Free memory was 325.3 MB in the beginning and 328.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.80 ms. Allocated memory is still 362.8 MB. Free memory was 328.4 MB in the beginning and 326.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: Boogie Preprocessor took 29.04 ms. Allocated memory is still 362.8 MB. Free memory was 326.3 MB in the beginning and 325.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: RCFGBuilder took 419.65 ms. Allocated memory is still 362.8 MB. Free memory was 325.2 MB in the beginning and 303.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,223 INFO L168 Benchmark]: TraceAbstraction took 29344.19 ms. Allocated memory was 362.8 MB in the beginning and 784.3 MB in the end (delta: 421.5 MB). Free memory was 302.1 MB in the beginning and 480.1 MB in the end (delta: -177.9 MB). Peak memory consumption was 244.6 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:08,224 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 362.8 MB. Free memory was 344.1 MB in the beginning and 344.1 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 345.61 ms. Allocated memory is still 362.8 MB. Free memory was 325.3 MB in the beginning and 328.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 6.8 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 33.80 ms. Allocated memory is still 362.8 MB. Free memory was 328.4 MB in the beginning and 326.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.04 ms. Allocated memory is still 362.8 MB. Free memory was 326.3 MB in the beginning and 325.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 419.65 ms. Allocated memory is still 362.8 MB. Free memory was 325.2 MB in the beginning and 303.2 MB in the end (delta: 22.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 29344.19 ms. Allocated memory was 362.8 MB in the beginning and 784.3 MB in the end (delta: 421.5 MB). Free memory was 302.1 MB in the beginning and 480.1 MB in the end (delta: -177.9 MB). Peak memory consumption was 244.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29269.0ms, OverallIterations: 46, TraceHistogramMax: 6, EmptinessCheckTime: 122.0ms, AutomataDifference: 9388.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 82.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4004 SDtfs, 15675 SDslu, 24670 SDs, 0 SdLazy, 4643 SolverSat, 1729 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2258.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3440 GetRequests, 2386 SyntacticMatches, 0 SemanticMatches, 1054 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5571 ImplicationChecksByTransitivity, 7775.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1924occurred in iteration=43, InterpolantAutomatonStates: 890, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1066.2ms AutomataMinimizationTime, 46 MinimizatonAttempts, 23735 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 382.7ms SsaConstructionTime, 956.2ms SatisfiabilityAnalysisTime, 7335.5ms InterpolantComputationTime, 4920 NumberOfCodeBlocks, 4889 NumberOfCodeBlocksAsserted, 166 NumberOfCheckSat, 4835 ConstructedInterpolants, 0 QuantifiedInterpolants, 18155 SizeOfPredicates, 328 NumberOfNonLiveVariables, 5525 ConjunctsInSsa, 530 ConjunctsInUnsatCore, 85 InterpolantComputations, 9 PerfectInterpolantSequences, 354/3080 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...