/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 15:01:09,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 15:01:09,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 15:01:09,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-10 15:01:09,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-10 15:01:09,990 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-10 15:01:09,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-10 15:01:09,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-10 15:01:09,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-10 15:01:10,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-10 15:01:10,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-10 15:01:10,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-10 15:01:10,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 15:01:10,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 15:01:10,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 15:01:10,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 15:01:10,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 15:01:10,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 15:01:10,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 15:01:10,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 15:01:10,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 15:01:10,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 15:01:10,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 15:01:10,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 15:01:10,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-10 15:01:10,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-10 15:01:10,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-10 15:01:10,031 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-10 15:01:10,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-10 15:01:10,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-03-10 15:01:10,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 15:01:10,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 15:01:10,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 15:01:10,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 15:01:10,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 15:01:10,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 15:01:10,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 15:01:10,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 15:01:10,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 15:01:10,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 15:01:10,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 15:01:10,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 15:01:10,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 15:01:10,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 15:01:10,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 15:01:10,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 15:01:10,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 15:01:10,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 15:01:10,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 15:01:10,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-10 15:01:10,332 INFO L275 PluginConnector]: CDTParser initialized [2021-03-10 15:01:10,333 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-03-10 15:01:10,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a0f5b7/542982da290a439cb16383f1fdd3eea6/FLAGe0103884c [2021-03-10 15:01:10,842 INFO L306 CDTParser]: Found 1 translation units. [2021-03-10 15:01:10,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-03-10 15:01:10,850 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a0f5b7/542982da290a439cb16383f1fdd3eea6/FLAGe0103884c [2021-03-10 15:01:10,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de3a0f5b7/542982da290a439cb16383f1fdd3eea6 [2021-03-10 15:01:10,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 15:01:10,866 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-10 15:01:10,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-10 15:01:10,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-10 15:01:10,870 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-10 15:01:10,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:01:10" (1/1) ... [2021-03-10 15:01:10,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305a2644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:10, skipping insertion in model container [2021-03-10 15:01:10,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.03 03:01:10" (1/1) ... [2021-03-10 15:01:10,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-10 15:01:10,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-10 15:01:11,132 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-2.i[30952,30965] [2021-03-10 15:01:11,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:01:11,142 INFO L203 MainTranslator]: Completed pre-run [2021-03-10 15:01:11,176 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-2.i[30952,30965] [2021-03-10 15:01:11,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-10 15:01:11,219 INFO L208 MainTranslator]: Completed translation [2021-03-10 15:01:11,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11 WrapperNode [2021-03-10 15:01:11,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-10 15:01:11,221 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 15:01:11,221 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 15:01:11,221 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 15:01:11,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,234 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 15:01:11,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 15:01:11,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 15:01:11,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 15:01:11,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,257 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... [2021-03-10 15:01:11,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 15:01:11,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 15:01:11,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 15:01:11,263 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 15:01:11,264 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 15:01:11,330 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-03-10 15:01:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-03-10 15:01:11,331 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-10 15:01:11,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-10 15:01:11,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 15:01:11,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 15:01:11,333 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 15:01:11,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 15:01:11,605 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-03-10 15:01:11,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:01:11 BoogieIcfgContainer [2021-03-10 15:01:11,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 15:01:11,607 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 15:01:11,607 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 15:01:11,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 15:01:11,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.03 03:01:10" (1/3) ... [2021-03-10 15:01:11,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cf575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:01:11, skipping insertion in model container [2021-03-10 15:01:11,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.03 03:01:11" (2/3) ... [2021-03-10 15:01:11,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d3cf575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 03:01:11, skipping insertion in model container [2021-03-10 15:01:11,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 03:01:11" (3/3) ... [2021-03-10 15:01:11,611 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-03-10 15:01:11,614 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 15:01:11,614 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 15:01:11,618 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 15:01:11,619 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 15:01:11,650 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,651 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,652 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,653 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,655 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,658 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,658 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,658 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,658 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,659 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,660 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,661 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,666 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,672 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,672 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,673 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,673 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-10 15:01:11,674 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-10 15:01:11,686 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 15:01:11,709 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 15:01:11,710 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 15:01:11,710 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 15:01:11,710 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 15:01:11,710 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 15:01:11,710 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 15:01:11,710 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 15:01:11,710 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 15:01:11,720 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 62 places, 60 transitions, 130 flow [2021-03-10 15:01:11,790 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:11,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 15:01:11,814 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:11,815 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:11,815 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:11,820 INFO L82 PathProgramCache]: Analyzing trace with hash 962891533, now seen corresponding path program 1 times [2021-03-10 15:01:11,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:11,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108473246] [2021-03-10 15:01:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:12,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108473246] [2021-03-10 15:01:12,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:12,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:12,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724748258] [2021-03-10 15:01:12,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:12,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:12,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:12,116 INFO L87 Difference]: Start difference. First operand has 1548 states, 1546 states have (on average 3.1571798188874514) internal successors, (4881), 1547 states have internal predecessors, (4881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:12,267 INFO L93 Difference]: Finished difference Result 3048 states and 8864 transitions. [2021-03-10 15:01:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 15:01:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-03-10 15:01:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:12,296 INFO L225 Difference]: With dead ends: 3048 [2021-03-10 15:01:12,296 INFO L226 Difference]: Without dead ends: 1032 [2021-03-10 15:01:12,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-03-10 15:01:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 648. [2021-03-10 15:01:12,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.7171561051004636) internal successors, (1758), 647 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1758 transitions. [2021-03-10 15:01:12,389 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1758 transitions. Word has length 26 [2021-03-10 15:01:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:12,389 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1758 transitions. [2021-03-10 15:01:12,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1758 transitions. [2021-03-10 15:01:12,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:01:12,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:12,395 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:12,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 15:01:12,396 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1660854806, now seen corresponding path program 1 times [2021-03-10 15:01:12,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:12,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509638887] [2021-03-10 15:01:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:12,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509638887] [2021-03-10 15:01:12,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:12,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407978453] [2021-03-10 15:01:12,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:12,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:12,531 INFO L87 Difference]: Start difference. First operand 648 states and 1758 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:12,602 INFO L93 Difference]: Finished difference Result 1627 states and 4316 transitions. [2021-03-10 15:01:12,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:01:12,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 15:01:12,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:12,610 INFO L225 Difference]: With dead ends: 1627 [2021-03-10 15:01:12,611 INFO L226 Difference]: Without dead ends: 1371 [2021-03-10 15:01:12,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 15:01:12,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-03-10 15:01:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 822. [2021-03-10 15:01:12,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 2.705237515225335) internal successors, (2221), 821 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2221 transitions. [2021-03-10 15:01:12,641 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2221 transitions. Word has length 30 [2021-03-10 15:01:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:12,642 INFO L480 AbstractCegarLoop]: Abstraction has 822 states and 2221 transitions. [2021-03-10 15:01:12,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2221 transitions. [2021-03-10 15:01:12,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 15:01:12,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:12,653 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:12,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 15:01:12,653 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1932703408, now seen corresponding path program 2 times [2021-03-10 15:01:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:12,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188941283] [2021-03-10 15:01:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:12,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:12,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188941283] [2021-03-10 15:01:12,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:12,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-10 15:01:12,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647839107] [2021-03-10 15:01:12,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 15:01:12,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 15:01:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-03-10 15:01:12,760 INFO L87 Difference]: Start difference. First operand 822 states and 2221 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:12,847 INFO L93 Difference]: Finished difference Result 1099 states and 2837 transitions. [2021-03-10 15:01:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 15:01:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 15:01:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:12,851 INFO L225 Difference]: With dead ends: 1099 [2021-03-10 15:01:12,851 INFO L226 Difference]: Without dead ends: 774 [2021-03-10 15:01:12,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-03-10 15:01:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 682. [2021-03-10 15:01:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 2.6637298091042583) internal successors, (1814), 681 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1814 transitions. [2021-03-10 15:01:12,866 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1814 transitions. Word has length 30 [2021-03-10 15:01:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:12,867 INFO L480 AbstractCegarLoop]: Abstraction has 682 states and 1814 transitions. [2021-03-10 15:01:12,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1814 transitions. [2021-03-10 15:01:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:12,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:12,868 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:12,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 15:01:12,868 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash 815370861, now seen corresponding path program 1 times [2021-03-10 15:01:12,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:12,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955187117] [2021-03-10 15:01:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:12,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955187117] [2021-03-10 15:01:12,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:12,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-03-10 15:01:12,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295533794] [2021-03-10 15:01:12,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 15:01:12,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:12,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 15:01:12,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 15:01:12,962 INFO L87 Difference]: Start difference. First operand 682 states and 1814 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:13,053 INFO L93 Difference]: Finished difference Result 1442 states and 3782 transitions. [2021-03-10 15:01:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:13,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 15:01:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:13,058 INFO L225 Difference]: With dead ends: 1442 [2021-03-10 15:01:13,058 INFO L226 Difference]: Without dead ends: 1175 [2021-03-10 15:01:13,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:13,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-03-10 15:01:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 727. [2021-03-10 15:01:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 2.62534435261708) internal successors, (1906), 726 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 1906 transitions. [2021-03-10 15:01:13,074 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 1906 transitions. Word has length 34 [2021-03-10 15:01:13,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:13,075 INFO L480 AbstractCegarLoop]: Abstraction has 727 states and 1906 transitions. [2021-03-10 15:01:13,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 1906 transitions. [2021-03-10 15:01:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:13,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:13,076 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:13,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 15:01:13,076 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:13,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:13,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1916820389, now seen corresponding path program 2 times [2021-03-10 15:01:13,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:13,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910830985] [2021-03-10 15:01:13,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:13,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910830985] [2021-03-10 15:01:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:13,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:13,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491784310] [2021-03-10 15:01:13,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:13,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:13,130 INFO L87 Difference]: Start difference. First operand 727 states and 1906 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:13,241 INFO L93 Difference]: Finished difference Result 1881 states and 4916 transitions. [2021-03-10 15:01:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 15:01:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:13,252 INFO L225 Difference]: With dead ends: 1881 [2021-03-10 15:01:13,252 INFO L226 Difference]: Without dead ends: 1614 [2021-03-10 15:01:13,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-03-10 15:01:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 821. [2021-03-10 15:01:13,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.7085365853658536) internal successors, (2221), 820 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 2221 transitions. [2021-03-10 15:01:13,279 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 2221 transitions. Word has length 34 [2021-03-10 15:01:13,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:13,280 INFO L480 AbstractCegarLoop]: Abstraction has 821 states and 2221 transitions. [2021-03-10 15:01:13,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,280 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 2221 transitions. [2021-03-10 15:01:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:13,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:13,281 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:13,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 15:01:13,281 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:13,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:13,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1894477139, now seen corresponding path program 3 times [2021-03-10 15:01:13,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:13,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284087812] [2021-03-10 15:01:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:13,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284087812] [2021-03-10 15:01:13,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:13,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:13,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885290553] [2021-03-10 15:01:13,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:13,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:13,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:13,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:13,429 INFO L87 Difference]: Start difference. First operand 821 states and 2221 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:13,532 INFO L93 Difference]: Finished difference Result 1149 states and 2989 transitions. [2021-03-10 15:01:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 15:01:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:13,536 INFO L225 Difference]: With dead ends: 1149 [2021-03-10 15:01:13,536 INFO L226 Difference]: Without dead ends: 813 [2021-03-10 15:01:13,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:13,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-03-10 15:01:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 694. [2021-03-10 15:01:13,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.6507936507936507) internal successors, (1837), 693 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1837 transitions. [2021-03-10 15:01:13,551 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1837 transitions. Word has length 34 [2021-03-10 15:01:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:13,552 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1837 transitions. [2021-03-10 15:01:13,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1837 transitions. [2021-03-10 15:01:13,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 15:01:13,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:13,554 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:13,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 15:01:13,554 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1589715209, now seen corresponding path program 4 times [2021-03-10 15:01:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:13,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959605486] [2021-03-10 15:01:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:13,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:13,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959605486] [2021-03-10 15:01:13,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 15:01:13,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-10 15:01:13,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482283251] [2021-03-10 15:01:13,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 15:01:13,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 15:01:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-03-10 15:01:13,628 INFO L87 Difference]: Start difference. First operand 694 states and 1837 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:13,754 INFO L93 Difference]: Finished difference Result 1146 states and 2975 transitions. [2021-03-10 15:01:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 15:01:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 15:01:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:13,759 INFO L225 Difference]: With dead ends: 1146 [2021-03-10 15:01:13,759 INFO L226 Difference]: Without dead ends: 922 [2021-03-10 15:01:13,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:13,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-03-10 15:01:13,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 804. [2021-03-10 15:01:13,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 2.6986301369863015) internal successors, (2167), 803 states have internal predecessors, (2167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2167 transitions. [2021-03-10 15:01:13,774 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2167 transitions. Word has length 34 [2021-03-10 15:01:13,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:13,775 INFO L480 AbstractCegarLoop]: Abstraction has 804 states and 2167 transitions. [2021-03-10 15:01:13,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2167 transitions. [2021-03-10 15:01:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:13,776 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:13,777 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:13,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-10 15:01:13,777 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:13,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:13,777 INFO L82 PathProgramCache]: Analyzing trace with hash 583669760, now seen corresponding path program 1 times [2021-03-10 15:01:13,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:13,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215717882] [2021-03-10 15:01:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215717882] [2021-03-10 15:01:13,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846430923] [2021-03-10 15:01:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:13,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:13,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:14,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:14,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 15:01:14,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936668031] [2021-03-10 15:01:14,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 15:01:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 15:01:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 15:01:14,025 INFO L87 Difference]: Start difference. First operand 804 states and 2167 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:14,094 INFO L93 Difference]: Finished difference Result 1202 states and 3091 transitions. [2021-03-10 15:01:14,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 15:01:14,094 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 15:01:14,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:14,097 INFO L225 Difference]: With dead ends: 1202 [2021-03-10 15:01:14,097 INFO L226 Difference]: Without dead ends: 932 [2021-03-10 15:01:14,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2021-03-10 15:01:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 849. [2021-03-10 15:01:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.661556603773585) internal successors, (2257), 848 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2257 transitions. [2021-03-10 15:01:14,115 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2257 transitions. Word has length 39 [2021-03-10 15:01:14,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:14,116 INFO L480 AbstractCegarLoop]: Abstraction has 849 states and 2257 transitions. [2021-03-10 15:01:14,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,116 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2257 transitions. [2021-03-10 15:01:14,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-03-10 15:01:14,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:14,117 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:14,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-03-10 15:01:14,334 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:14,334 INFO L82 PathProgramCache]: Analyzing trace with hash 550525025, now seen corresponding path program 1 times [2021-03-10 15:01:14,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:14,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052340357] [2021-03-10 15:01:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052340357] [2021-03-10 15:01:14,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537271255] [2021-03-10 15:01:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:14,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:14,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-03-10 15:01:14,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338376188] [2021-03-10 15:01:14,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:14,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:14,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:14,578 INFO L87 Difference]: Start difference. First operand 849 states and 2257 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:14,697 INFO L93 Difference]: Finished difference Result 1701 states and 4409 transitions. [2021-03-10 15:01:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:01:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-03-10 15:01:14,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:14,702 INFO L225 Difference]: With dead ends: 1701 [2021-03-10 15:01:14,702 INFO L226 Difference]: Without dead ends: 1277 [2021-03-10 15:01:14,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:01:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2021-03-10 15:01:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1012. [2021-03-10 15:01:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.6340257171117707) internal successors, (2663), 1011 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2663 transitions. [2021-03-10 15:01:14,727 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2663 transitions. Word has length 39 [2021-03-10 15:01:14,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:14,728 INFO L480 AbstractCegarLoop]: Abstraction has 1012 states and 2663 transitions. [2021-03-10 15:01:14,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:14,728 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2663 transitions. [2021-03-10 15:01:14,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:14,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:14,730 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:14,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:14,943 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1666045125, now seen corresponding path program 2 times [2021-03-10 15:01:14,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:14,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885912294] [2021-03-10 15:01:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:14,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885912294] [2021-03-10 15:01:14,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638653990] [2021-03-10 15:01:14,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:15,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:15,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:15,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 15:01:15,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:15,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:15,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-03-10 15:01:15,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179847415] [2021-03-10 15:01:15,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 15:01:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:15,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 15:01:15,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-10 15:01:15,122 INFO L87 Difference]: Start difference. First operand 1012 states and 2663 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:15,231 INFO L93 Difference]: Finished difference Result 2450 states and 6418 transitions. [2021-03-10 15:01:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:01:15,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 15:01:15,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:15,239 INFO L225 Difference]: With dead ends: 2450 [2021-03-10 15:01:15,239 INFO L226 Difference]: Without dead ends: 2150 [2021-03-10 15:01:15,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 15:01:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-03-10 15:01:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1272. [2021-03-10 15:01:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1271 states have (on average 2.725413060582219) internal successors, (3464), 1271 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 3464 transitions. [2021-03-10 15:01:15,274 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 3464 transitions. Word has length 44 [2021-03-10 15:01:15,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:15,275 INFO L480 AbstractCegarLoop]: Abstraction has 1272 states and 3464 transitions. [2021-03-10 15:01:15,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 3464 transitions. [2021-03-10 15:01:15,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-03-10 15:01:15,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:15,276 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:15,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 15:01:15,491 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:15,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:15,492 INFO L82 PathProgramCache]: Analyzing trace with hash -44610840, now seen corresponding path program 1 times [2021-03-10 15:01:15,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:15,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699239951] [2021-03-10 15:01:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699239951] [2021-03-10 15:01:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231489926] [2021-03-10 15:01:15,546 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 15:01:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:15,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:15,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:15,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:01:15,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053440969] [2021-03-10 15:01:15,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:15,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:15,690 INFO L87 Difference]: Start difference. First operand 1272 states and 3464 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:15,838 INFO L93 Difference]: Finished difference Result 1798 states and 4761 transitions. [2021-03-10 15:01:15,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:01:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-03-10 15:01:15,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:15,843 INFO L225 Difference]: With dead ends: 1798 [2021-03-10 15:01:15,843 INFO L226 Difference]: Without dead ends: 1327 [2021-03-10 15:01:15,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:01:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-03-10 15:01:15,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1142. [2021-03-10 15:01:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1142 states, 1141 states have (on average 2.7020157756354077) internal successors, (3083), 1141 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1142 states to 1142 states and 3083 transitions. [2021-03-10 15:01:15,867 INFO L78 Accepts]: Start accepts. Automaton has 1142 states and 3083 transitions. Word has length 44 [2021-03-10 15:01:15,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:15,867 INFO L480 AbstractCegarLoop]: Abstraction has 1142 states and 3083 transitions. [2021-03-10 15:01:15,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1142 states and 3083 transitions. [2021-03-10 15:01:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:15,869 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:15,869 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:16,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:16,079 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:16,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:16,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2043440179, now seen corresponding path program 2 times [2021-03-10 15:01:16,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113270940] [2021-03-10 15:01:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:16,186 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:16,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113270940] [2021-03-10 15:01:16,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085480533] [2021-03-10 15:01:16,186 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 15:01:16,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:16,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:16,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:16,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:16,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:16,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-03-10 15:01:16,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897453154] [2021-03-10 15:01:16,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:16,376 INFO L87 Difference]: Start difference. First operand 1142 states and 3083 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:16,511 INFO L93 Difference]: Finished difference Result 2037 states and 5193 transitions. [2021-03-10 15:01:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:16,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 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 49 [2021-03-10 15:01:16,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:16,517 INFO L225 Difference]: With dead ends: 2037 [2021-03-10 15:01:16,517 INFO L226 Difference]: Without dead ends: 1673 [2021-03-10 15:01:16,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-03-10 15:01:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2021-03-10 15:01:16,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1219. [2021-03-10 15:01:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 1218 states have (on average 2.6576354679802954) internal successors, (3237), 1218 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 3237 transitions. [2021-03-10 15:01:16,542 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 3237 transitions. Word has length 49 [2021-03-10 15:01:16,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:16,542 INFO L480 AbstractCegarLoop]: Abstraction has 1219 states and 3237 transitions. [2021-03-10 15:01:16,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 3237 transitions. [2021-03-10 15:01:16,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:16,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:16,544 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:16,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 15:01:16,764 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:16,764 INFO L82 PathProgramCache]: Analyzing trace with hash -784433019, now seen corresponding path program 3 times [2021-03-10 15:01:16,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:16,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919480913] [2021-03-10 15:01:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919480913] [2021-03-10 15:01:16,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693589193] [2021-03-10 15:01:16,824 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 15:01:16,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 15:01:16,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:16,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:16,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:16,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:16,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:01:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702312853] [2021-03-10 15:01:16,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:16,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:16,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:16,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:16,983 INFO L87 Difference]: Start difference. First operand 1219 states and 3237 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:17,083 INFO L93 Difference]: Finished difference Result 1872 states and 4671 transitions. [2021-03-10 15:01:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 15:01:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:01:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:17,091 INFO L225 Difference]: With dead ends: 1872 [2021-03-10 15:01:17,091 INFO L226 Difference]: Without dead ends: 1587 [2021-03-10 15:01:17,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:01:17,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-03-10 15:01:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1199. [2021-03-10 15:01:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.6686143572621037) internal successors, (3197), 1198 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3197 transitions. [2021-03-10 15:01:17,120 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3197 transitions. Word has length 49 [2021-03-10 15:01:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:17,120 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 3197 transitions. [2021-03-10 15:01:17,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3197 transitions. [2021-03-10 15:01:17,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:17,121 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:17,121 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:17,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:17,329 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:17,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1513252901, now seen corresponding path program 4 times [2021-03-10 15:01:17,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:17,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381821176] [2021-03-10 15:01:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:17,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:17,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381821176] [2021-03-10 15:01:17,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477434380] [2021-03-10 15:01:17,389 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 15:01:17,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 15:01:17,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 15:01:17,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:17,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 15:01:17,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729762270] [2021-03-10 15:01:17,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 15:01:17,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:17,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 15:01:17,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-03-10 15:01:17,537 INFO L87 Difference]: Start difference. First operand 1199 states and 3197 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:17,649 INFO L93 Difference]: Finished difference Result 2555 states and 6633 transitions. [2021-03-10 15:01:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:01:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:01:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:17,666 INFO L225 Difference]: With dead ends: 2555 [2021-03-10 15:01:17,666 INFO L226 Difference]: Without dead ends: 2255 [2021-03-10 15:01:17,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 15:01:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-03-10 15:01:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1284. [2021-03-10 15:01:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 2.726422447388932) internal successors, (3498), 1283 states have internal predecessors, (3498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 3498 transitions. [2021-03-10 15:01:17,708 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 3498 transitions. Word has length 49 [2021-03-10 15:01:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:17,708 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 3498 transitions. [2021-03-10 15:01:17,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 3498 transitions. [2021-03-10 15:01:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:17,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:17,710 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:17,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 15:01:17,919 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:17,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:17,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1160280110, now seen corresponding path program 5 times [2021-03-10 15:01:17,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:17,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923903991] [2021-03-10 15:01:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923903991] [2021-03-10 15:01:17,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607912091] [2021-03-10 15:01:17,968 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 15:01:18,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 15:01:18,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:18,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:18,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:18,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:18,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365579563] [2021-03-10 15:01:18,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:18,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:18,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:18,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:18,098 INFO L87 Difference]: Start difference. First operand 1284 states and 3498 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:18,237 INFO L93 Difference]: Finished difference Result 1873 states and 4916 transitions. [2021-03-10 15:01:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 15:01:18,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:01:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:18,240 INFO L225 Difference]: With dead ends: 1873 [2021-03-10 15:01:18,240 INFO L226 Difference]: Without dead ends: 1402 [2021-03-10 15:01:18,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:01:18,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1402 states. [2021-03-10 15:01:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1402 to 1024. [2021-03-10 15:01:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.6803519061583576) internal successors, (2742), 1023 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 2742 transitions. [2021-03-10 15:01:18,263 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 2742 transitions. Word has length 49 [2021-03-10 15:01:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:18,263 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 2742 transitions. [2021-03-10 15:01:18,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 2742 transitions. [2021-03-10 15:01:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:18,266 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:18,266 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:18,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 15:01:18,479 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:18,480 INFO L82 PathProgramCache]: Analyzing trace with hash -800989155, now seen corresponding path program 6 times [2021-03-10 15:01:18,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:18,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600610623] [2021-03-10 15:01:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:18,560 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:18,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600610623] [2021-03-10 15:01:18,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469670484] [2021-03-10 15:01:18,560 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 15:01:18,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 15:01:18,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:18,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:18,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:18,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:18,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:18,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343965845] [2021-03-10 15:01:18,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:18,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:18,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:18,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:18,705 INFO L87 Difference]: Start difference. First operand 1024 states and 2742 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:18,825 INFO L93 Difference]: Finished difference Result 1617 states and 4106 transitions. [2021-03-10 15:01:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:18,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:01:18,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:18,838 INFO L225 Difference]: With dead ends: 1617 [2021-03-10 15:01:18,838 INFO L226 Difference]: Without dead ends: 1347 [2021-03-10 15:01:18,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-03-10 15:01:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2021-03-10 15:01:18,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1074. [2021-03-10 15:01:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 2.69524697110904) internal successors, (2892), 1073 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 2892 transitions. [2021-03-10 15:01:18,858 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 2892 transitions. Word has length 49 [2021-03-10 15:01:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:18,858 INFO L480 AbstractCegarLoop]: Abstraction has 1074 states and 2892 transitions. [2021-03-10 15:01:18,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 2892 transitions. [2021-03-10 15:01:18,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:18,860 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:18,860 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:19,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:19,073 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1077315557, now seen corresponding path program 7 times [2021-03-10 15:01:19,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:19,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108364977] [2021-03-10 15:01:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108364977] [2021-03-10 15:01:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539944691] [2021-03-10 15:01:19,131 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 15:01:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:19,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 15:01:19,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:19,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:19,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:19,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 15:01:19,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941772351] [2021-03-10 15:01:19,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:19,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:19,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:19,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:19,254 INFO L87 Difference]: Start difference. First operand 1074 states and 2892 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:19,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:19,409 INFO L93 Difference]: Finished difference Result 2465 states and 6458 transitions. [2021-03-10 15:01:19,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:19,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-03-10 15:01:19,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:19,414 INFO L225 Difference]: With dead ends: 2465 [2021-03-10 15:01:19,414 INFO L226 Difference]: Without dead ends: 2195 [2021-03-10 15:01:19,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:19,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-03-10 15:01:19,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1249. [2021-03-10 15:01:19,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1248 states have (on average 2.7628205128205128) internal successors, (3448), 1248 states have internal predecessors, (3448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:19,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 3448 transitions. [2021-03-10 15:01:19,441 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 3448 transitions. Word has length 49 [2021-03-10 15:01:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:19,441 INFO L480 AbstractCegarLoop]: Abstraction has 1249 states and 3448 transitions. [2021-03-10 15:01:19,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:19,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 3448 transitions. [2021-03-10 15:01:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-03-10 15:01:19,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:19,442 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:19,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:19,652 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:19,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:19,652 INFO L82 PathProgramCache]: Analyzing trace with hash -417742817, now seen corresponding path program 8 times [2021-03-10 15:01:19,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:19,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253389577] [2021-03-10 15:01:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:19,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:19,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:19,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253389577] [2021-03-10 15:01:19,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345183069] [2021-03-10 15:01:19,710 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 15:01:19,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:19,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:19,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:19,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 15:01:19,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149805132] [2021-03-10 15:01:19,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:19,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:19,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:19,869 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 15:01:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:20,145 INFO L93 Difference]: Finished difference Result 2219 states and 5806 transitions. [2021-03-10 15:01:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:20,146 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 15:01:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:20,149 INFO L225 Difference]: With dead ends: 2219 [2021-03-10 15:01:20,149 INFO L226 Difference]: Without dead ends: 1692 [2021-03-10 15:01:20,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:01:20,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-03-10 15:01:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1259. [2021-03-10 15:01:20,167 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 15:01:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 3452 transitions. [2021-03-10 15:01:20,169 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 3452 transitions. Word has length 49 [2021-03-10 15:01:20,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:20,170 INFO L480 AbstractCegarLoop]: Abstraction has 1259 states and 3452 transitions. [2021-03-10 15:01:20,170 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 15:01:20,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 3452 transitions. [2021-03-10 15:01:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:20,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:20,174 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:20,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 15:01:20,387 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -255755739, now seen corresponding path program 9 times [2021-03-10 15:01:20,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:20,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767452570] [2021-03-10 15:01:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:20,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767452570] [2021-03-10 15:01:20,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785320953] [2021-03-10 15:01:20,466 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 15:01:20,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:01:20,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:20,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:20,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:20,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:20,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 15:01:20,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898010641] [2021-03-10 15:01:20,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:20,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:20,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:20,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:20,630 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 15:01:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:20,786 INFO L93 Difference]: Finished difference Result 2049 states and 5352 transitions. [2021-03-10 15:01:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:01:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 15:01:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:20,789 INFO L225 Difference]: With dead ends: 2049 [2021-03-10 15:01:20,789 INFO L226 Difference]: Without dead ends: 1715 [2021-03-10 15:01:20,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-03-10 15:01:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-03-10 15:01:20,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1344. [2021-03-10 15:01:20,811 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 15:01:20,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 3622 transitions. [2021-03-10 15:01:20,813 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 3622 transitions. Word has length 54 [2021-03-10 15:01:20,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:20,813 INFO L480 AbstractCegarLoop]: Abstraction has 1344 states and 3622 transitions. [2021-03-10 15:01:20,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:20,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 3622 transitions. [2021-03-10 15:01:20,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:20,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:20,815 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:21,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:21,031 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:21,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash 493439251, now seen corresponding path program 10 times [2021-03-10 15:01:21,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:21,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855307462] [2021-03-10 15:01:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:21,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855307462] [2021-03-10 15:01:21,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299127524] [2021-03-10 15:01:21,098 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 15:01:21,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:21,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:21,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:21,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:21,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196897781] [2021-03-10 15:01:21,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:21,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:21,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:21,208 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 15:01:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:21,340 INFO L93 Difference]: Finished difference Result 2142 states and 5346 transitions. [2021-03-10 15:01:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 15:01:21,341 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 15:01:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:21,344 INFO L225 Difference]: With dead ends: 2142 [2021-03-10 15:01:21,344 INFO L226 Difference]: Without dead ends: 1872 [2021-03-10 15:01:21,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-03-10 15:01:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-03-10 15:01:21,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1359. [2021-03-10 15:01:21,367 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 15:01:21,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-03-10 15:01:21,369 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-03-10 15:01:21,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:21,370 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-03-10 15:01:21,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:21,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-03-10 15:01:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:21,371 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:21,371 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:21,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 15:01:21,587 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1960125811, now seen corresponding path program 11 times [2021-03-10 15:01:21,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:21,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642782822] [2021-03-10 15:01:21,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:21,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642782822] [2021-03-10 15:01:21,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883456344] [2021-03-10 15:01:21,646 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 15:01:21,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 15:01:21,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:21,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:21,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:21,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137503215] [2021-03-10 15:01:21,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:21,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:21,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:21,750 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 15:01:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:21,881 INFO L93 Difference]: Finished difference Result 2027 states and 5116 transitions. [2021-03-10 15:01:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 15:01:21,881 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 15:01:21,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:21,884 INFO L225 Difference]: With dead ends: 2027 [2021-03-10 15:01:21,884 INFO L226 Difference]: Without dead ends: 1757 [2021-03-10 15:01:21,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 106.0ms TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 15:01:21,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-03-10 15:01:21,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1359. [2021-03-10 15:01:21,910 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 15:01:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 3652 transitions. [2021-03-10 15:01:21,917 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 3652 transitions. Word has length 54 [2021-03-10 15:01:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:21,917 INFO L480 AbstractCegarLoop]: Abstraction has 1359 states and 3652 transitions. [2021-03-10 15:01:21,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 3652 transitions. [2021-03-10 15:01:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:21,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:21,920 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:22,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:22,135 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1683799409, now seen corresponding path program 12 times [2021-03-10 15:01:22,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:22,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211938798] [2021-03-10 15:01:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211938798] [2021-03-10 15:01:22,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002998194] [2021-03-10 15:01:22,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:22,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 15:01:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:22,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:22,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:22,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-03-10 15:01:22,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375812749] [2021-03-10 15:01:22,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 15:01:22,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:22,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 15:01:22,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 15:01:22,317 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 15:01:22,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:22,479 INFO L93 Difference]: Finished difference Result 2725 states and 7108 transitions. [2021-03-10 15:01:22,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:22,479 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 15:01:22,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:22,484 INFO L225 Difference]: With dead ends: 2725 [2021-03-10 15:01:22,484 INFO L226 Difference]: Without dead ends: 2455 [2021-03-10 15:01:22,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-03-10 15:01:22,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 1484. [2021-03-10 15:01:22,515 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 15:01:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4048 transitions. [2021-03-10 15:01:22,517 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4048 transitions. Word has length 54 [2021-03-10 15:01:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:22,517 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4048 transitions. [2021-03-10 15:01:22,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4048 transitions. [2021-03-10 15:01:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-03-10 15:01:22,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:22,519 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:22,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 15:01:22,736 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:22,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:22,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1951595147, now seen corresponding path program 13 times [2021-03-10 15:01:22,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:22,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86877017] [2021-03-10 15:01:22,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86877017] [2021-03-10 15:01:22,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015090179] [2021-03-10 15:01:22,799 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 15:01:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:22,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 15:01:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:22,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:22,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 15:01:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146390956] [2021-03-10 15:01:22,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:22,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:22,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:22,917 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 15:01:23,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:23,216 INFO L93 Difference]: Finished difference Result 2459 states and 6366 transitions. [2021-03-10 15:01:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:23,216 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-03-10 15:01:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:23,219 INFO L225 Difference]: With dead ends: 2459 [2021-03-10 15:01:23,219 INFO L226 Difference]: Without dead ends: 1932 [2021-03-10 15:01:23,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:01:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2021-03-10 15:01:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1234. [2021-03-10 15:01:23,237 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 15:01:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3292 transitions. [2021-03-10 15:01:23,239 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3292 transitions. Word has length 54 [2021-03-10 15:01:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:23,239 INFO L480 AbstractCegarLoop]: Abstraction has 1234 states and 3292 transitions. [2021-03-10 15:01:23,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:23,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3292 transitions. [2021-03-10 15:01:23,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:23,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:23,241 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:23,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:23,455 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:23,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:23,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1556878, now seen corresponding path program 14 times [2021-03-10 15:01:23,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:23,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322869313] [2021-03-10 15:01:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322869313] [2021-03-10 15:01:23,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264293063] [2021-03-10 15:01:23,543 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 15:01:23,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:23,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:23,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:23,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592597705] [2021-03-10 15:01:23,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:23,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:23,664 INFO L87 Difference]: Start difference. First operand 1234 states and 3292 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:23,824 INFO L93 Difference]: Finished difference Result 1927 states and 4856 transitions. [2021-03-10 15:01:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 15:01:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 15:01:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:23,828 INFO L225 Difference]: With dead ends: 1927 [2021-03-10 15:01:23,828 INFO L226 Difference]: Without dead ends: 1657 [2021-03-10 15:01:23,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-03-10 15:01:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-03-10 15:01:23,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1284. [2021-03-10 15:01:23,845 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 15:01:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 3442 transitions. [2021-03-10 15:01:23,847 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 3442 transitions. Word has length 59 [2021-03-10 15:01:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:23,847 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 3442 transitions. [2021-03-10 15:01:23,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 3442 transitions. [2021-03-10 15:01:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:23,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:23,849 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:24,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 15:01:24,065 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:24,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash 322434060, now seen corresponding path program 15 times [2021-03-10 15:01:24,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:24,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646921486] [2021-03-10 15:01:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:24,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646921486] [2021-03-10 15:01:24,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849557455] [2021-03-10 15:01:24,143 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 15:01:24,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 15:01:24,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:01:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:24,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:24,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:24,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040810979] [2021-03-10 15:01:24,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:24,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:24,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:24,262 INFO L87 Difference]: Start difference. First operand 1284 states and 3442 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:24,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:24,455 INFO L93 Difference]: Finished difference Result 2132 states and 5381 transitions. [2021-03-10 15:01:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:24,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 15:01:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:24,458 INFO L225 Difference]: With dead ends: 2132 [2021-03-10 15:01:24,458 INFO L226 Difference]: Without dead ends: 1862 [2021-03-10 15:01:24,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=181, Invalid=521, Unknown=0, NotChecked=0, Total=702 [2021-03-10 15:01:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-03-10 15:01:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1384. [2021-03-10 15:01:24,477 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 15:01:24,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 3752 transitions. [2021-03-10 15:01:24,479 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 3752 transitions. Word has length 59 [2021-03-10 15:01:24,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:24,479 INFO L480 AbstractCegarLoop]: Abstraction has 1384 states and 3752 transitions. [2021-03-10 15:01:24,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 3752 transitions. [2021-03-10 15:01:24,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:24,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:24,481 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:24,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 15:01:24,695 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:24,696 INFO L82 PathProgramCache]: Analyzing trace with hash 46107658, now seen corresponding path program 16 times [2021-03-10 15:01:24,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:24,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837219915] [2021-03-10 15:01:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837219915] [2021-03-10 15:01:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464757164] [2021-03-10 15:01:24,758 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 15:01:24,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:24,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:24,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:24,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:24,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-03-10 15:01:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316163944] [2021-03-10 15:01:24,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 15:01:24,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 15:01:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 15:01:24,867 INFO L87 Difference]: Start difference. First operand 1384 states and 3752 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:25,114 INFO L93 Difference]: Finished difference Result 3141 states and 8262 transitions. [2021-03-10 15:01:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:01:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-03-10 15:01:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:25,119 INFO L225 Difference]: With dead ends: 3141 [2021-03-10 15:01:25,119 INFO L226 Difference]: Without dead ends: 2660 [2021-03-10 15:01:25,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-03-10 15:01:25,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-03-10 15:01:25,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 1559. [2021-03-10 15:01:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1559 states, 1558 states have (on average 2.7586649550706035) internal successors, (4298), 1558 states have internal predecessors, (4298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:25,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 4298 transitions. [2021-03-10 15:01:25,152 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 4298 transitions. Word has length 59 [2021-03-10 15:01:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:25,152 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 4298 transitions. [2021-03-10 15:01:25,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 4298 transitions. [2021-03-10 15:01:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-03-10 15:01:25,168 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:25,169 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:25,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 15:01:25,383 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash 705680398, now seen corresponding path program 17 times [2021-03-10 15:01:25,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:25,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944738033] [2021-03-10 15:01:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:25,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:25,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944738033] [2021-03-10 15:01:25,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085662782] [2021-03-10 15:01:25,462 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 15:01:25,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 15:01:25,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:25,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 15:01:25,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:25,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:25,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 15:01:25,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555746167] [2021-03-10 15:01:25,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 15:01:25,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:25,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 15:01:25,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 15:01:25,593 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 15:01:25,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:25,863 INFO L93 Difference]: Finished difference Result 2198 states and 5816 transitions. [2021-03-10 15:01:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:25,863 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 15:01:25,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:25,866 INFO L225 Difference]: With dead ends: 2198 [2021-03-10 15:01:25,866 INFO L226 Difference]: Without dead ends: 1787 [2021-03-10 15:01:25,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:01:25,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-03-10 15:01:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1509. [2021-03-10 15:01:25,884 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 15:01:25,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 4152 transitions. [2021-03-10 15:01:25,886 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 4152 transitions. Word has length 59 [2021-03-10 15:01:25,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:25,886 INFO L480 AbstractCegarLoop]: Abstraction has 1509 states and 4152 transitions. [2021-03-10 15:01:25,886 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 15:01:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 4152 transitions. [2021-03-10 15:01:25,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:25,888 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:25,888 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:26,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:26,104 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:26,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash 142897558, now seen corresponding path program 18 times [2021-03-10 15:01:26,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:26,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436266345] [2021-03-10 15:01:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436266345] [2021-03-10 15:01:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055264119] [2021-03-10 15:01:26,226 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 15:01:26,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:01:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:26,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:26,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-03-10 15:01:26,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484038859] [2021-03-10 15:01:26,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 15:01:26,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:26,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 15:01:26,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-03-10 15:01:26,387 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 15:01:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:26,596 INFO L93 Difference]: Finished difference Result 2349 states and 6152 transitions. [2021-03-10 15:01:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:01:26,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:26,600 INFO L225 Difference]: With dead ends: 2349 [2021-03-10 15:01:26,600 INFO L226 Difference]: Without dead ends: 2015 [2021-03-10 15:01:26,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:01:26,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-03-10 15:01:26,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1594. [2021-03-10 15:01:26,625 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 15:01:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 4322 transitions. [2021-03-10 15:01:26,628 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 4322 transitions. Word has length 64 [2021-03-10 15:01:26,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:26,628 INFO L480 AbstractCegarLoop]: Abstraction has 1594 states and 4322 transitions. [2021-03-10 15:01:26,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:26,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 4322 transitions. [2021-03-10 15:01:26,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:26,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:26,632 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:26,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:26,843 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1155591940, now seen corresponding path program 19 times [2021-03-10 15:01:26,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:26,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231564955] [2021-03-10 15:01:26,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:26,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231564955] [2021-03-10 15:01:26,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633962895] [2021-03-10 15:01:26,948 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 15:01:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:26,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:27,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:27,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:27,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85290094] [2021-03-10 15:01:27,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:27,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:27,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:27,070 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 15:01:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:27,207 INFO L93 Difference]: Finished difference Result 2542 states and 6346 transitions. [2021-03-10 15:01:27,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 15:01:27,208 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:27,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:27,210 INFO L225 Difference]: With dead ends: 2542 [2021-03-10 15:01:27,210 INFO L226 Difference]: Without dead ends: 2272 [2021-03-10 15:01:27,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-03-10 15:01:27,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-03-10 15:01:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1609. [2021-03-10 15:01:27,231 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 15:01:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:01:27,234 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:01:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:27,234 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:01:27,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:01:27,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:27,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:27,236 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:27,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:27,451 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:27,452 INFO L82 PathProgramCache]: Analyzing trace with hash -236137628, now seen corresponding path program 20 times [2021-03-10 15:01:27,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:27,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099829734] [2021-03-10 15:01:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:27,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099829734] [2021-03-10 15:01:27,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000937464] [2021-03-10 15:01:27,543 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 15:01:27,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:27,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:27,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:27,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:27,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:27,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678414056] [2021-03-10 15:01:27,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:27,671 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 15:01:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:27,860 INFO L93 Difference]: Finished difference Result 2427 states and 6116 transitions. [2021-03-10 15:01:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 15:01:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:27,863 INFO L225 Difference]: With dead ends: 2427 [2021-03-10 15:01:27,863 INFO L226 Difference]: Without dead ends: 2157 [2021-03-10 15:01:27,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-03-10 15:01:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-03-10 15:01:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1609. [2021-03-10 15:01:27,886 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 15:01:27,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:01:27,888 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:01:27,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:27,889 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:01:27,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:27,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:01:27,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:27,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:27,890 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:28,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 15:01:28,103 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash 84739554, now seen corresponding path program 21 times [2021-03-10 15:01:28,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:28,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816680026] [2021-03-10 15:01:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:28,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816680026] [2021-03-10 15:01:28,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956714997] [2021-03-10 15:01:28,179 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 15:01:28,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:01:28,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:28,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 15:01:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:28,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:28,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166010548] [2021-03-10 15:01:28,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:28,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:28,341 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 15:01:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:28,541 INFO L93 Difference]: Finished difference Result 2327 states and 5916 transitions. [2021-03-10 15:01:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 15:01:28,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:28,544 INFO L225 Difference]: With dead ends: 2327 [2021-03-10 15:01:28,544 INFO L226 Difference]: Without dead ends: 2057 [2021-03-10 15:01:28,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-03-10 15:01:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2021-03-10 15:01:28,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1609. [2021-03-10 15:01:28,563 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 15:01:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1609 states to 1609 states and 4352 transitions. [2021-03-10 15:01:28,565 INFO L78 Accepts]: Start accepts. Automaton has 1609 states and 4352 transitions. Word has length 64 [2021-03-10 15:01:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:28,566 INFO L480 AbstractCegarLoop]: Abstraction has 1609 states and 4352 transitions. [2021-03-10 15:01:28,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:28,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1609 states and 4352 transitions. [2021-03-10 15:01:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:28,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:28,567 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:28,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:28,775 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:28,776 INFO L82 PathProgramCache]: Analyzing trace with hash -191586848, now seen corresponding path program 22 times [2021-03-10 15:01:28,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:28,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296475200] [2021-03-10 15:01:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296475200] [2021-03-10 15:01:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653677499] [2021-03-10 15:01:28,848 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 15:01:28,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:28,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:28,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:28,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:28,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:28,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:28,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121894179] [2021-03-10 15:01:28,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:28,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:28,968 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 15:01:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:29,231 INFO L93 Difference]: Finished difference Result 3281 states and 8612 transitions. [2021-03-10 15:01:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 15:01:29,232 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:29,235 INFO L225 Difference]: With dead ends: 3281 [2021-03-10 15:01:29,235 INFO L226 Difference]: Without dead ends: 2800 [2021-03-10 15:01:29,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 213.2ms TimeCoverageRelationStatistics Valid=268, Invalid=724, Unknown=0, NotChecked=0, Total=992 [2021-03-10 15:01:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-03-10 15:01:29,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1674. [2021-03-10 15:01:29,260 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 15:01:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4598 transitions. [2021-03-10 15:01:29,263 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4598 transitions. Word has length 64 [2021-03-10 15:01:29,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:29,263 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4598 transitions. [2021-03-10 15:01:29,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:29,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4598 transitions. [2021-03-10 15:01:29,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-03-10 15:01:29,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:29,265 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 15:01:29,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 15:01:29,468 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:29,468 INFO L82 PathProgramCache]: Analyzing trace with hash 467985892, now seen corresponding path program 23 times [2021-03-10 15:01:29,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:29,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669271061] [2021-03-10 15:01:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:29,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669271061] [2021-03-10 15:01:29,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762932148] [2021-03-10 15:01:29,529 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 15:01:29,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 15:01:29,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:29,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 15:01:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 15:01:29,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:29,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 15:01:29,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990424716] [2021-03-10 15:01:29,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:29,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:29,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:29,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:29,647 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 15:01:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:29,946 INFO L93 Difference]: Finished difference Result 2363 states and 6216 transitions. [2021-03-10 15:01:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:29,947 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-03-10 15:01:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:29,949 INFO L225 Difference]: With dead ends: 2363 [2021-03-10 15:01:29,949 INFO L226 Difference]: Without dead ends: 1952 [2021-03-10 15:01:29,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=311, Invalid=811, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 15:01:29,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-03-10 15:01:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1324. [2021-03-10 15:01:29,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.677248677248677) internal successors, (3542), 1323 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3542 transitions. [2021-03-10 15:01:29,968 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3542 transitions. Word has length 64 [2021-03-10 15:01:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:29,968 INFO L480 AbstractCegarLoop]: Abstraction has 1324 states and 3542 transitions. [2021-03-10 15:01:29,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3542 transitions. [2021-03-10 15:01:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:29,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:29,969 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 15:01:30,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 15:01:30,183 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:30,184 INFO L82 PathProgramCache]: Analyzing trace with hash -474265153, now seen corresponding path program 24 times [2021-03-10 15:01:30,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:30,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713355037] [2021-03-10 15:01:30,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:30,266 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 15:01:30,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713355037] [2021-03-10 15:01:30,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196777802] [2021-03-10 15:01:30,267 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 15:01:30,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 15:01:30,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:30,403 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 15:01:30,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:30,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:30,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888938691] [2021-03-10 15:01:30,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:30,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:30,404 INFO L87 Difference]: Start difference. First operand 1324 states and 3542 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:30,573 INFO L93 Difference]: Finished difference Result 2117 states and 5306 transitions. [2021-03-10 15:01:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 15:01:30,573 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 15:01:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:30,576 INFO L225 Difference]: With dead ends: 2117 [2021-03-10 15:01:30,576 INFO L226 Difference]: Without dead ends: 1847 [2021-03-10 15:01:30,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-03-10 15:01:30,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2021-03-10 15:01:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1374. [2021-03-10 15:01:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.689002184996358) internal successors, (3692), 1373 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 3692 transitions. [2021-03-10 15:01:30,594 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 3692 transitions. Word has length 69 [2021-03-10 15:01:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:30,594 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 3692 transitions. [2021-03-10 15:01:30,594 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 15:01:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 3692 transitions. [2021-03-10 15:01:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:30,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:30,596 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 15:01:30,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 15:01:30,809 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2108361027, now seen corresponding path program 25 times [2021-03-10 15:01:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:30,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899887399] [2021-03-10 15:01:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:30,896 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 15:01:30,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899887399] [2021-03-10 15:01:30,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996151038] [2021-03-10 15:01:30,897 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 15:01:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:30,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:30,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:31,019 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 15:01:31,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:31,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:31,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336181576] [2021-03-10 15:01:31,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:31,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:31,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:31,021 INFO L87 Difference]: Start difference. First operand 1374 states and 3692 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:31,218 INFO L93 Difference]: Finished difference Result 2342 states and 5856 transitions. [2021-03-10 15:01:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 15:01:31,218 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 15:01:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:31,221 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:01:31,221 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:01:31,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-03-10 15:01:31,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:01:31,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1474. [2021-03-10 15:01:31,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 1473 states have (on average 2.7101154107264085) internal successors, (3992), 1473 states have internal predecessors, (3992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 15:01:31,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 3992 transitions. [2021-03-10 15:01:31,242 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 3992 transitions. Word has length 69 [2021-03-10 15:01:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:31,242 INFO L480 AbstractCegarLoop]: Abstraction has 1474 states and 3992 transitions. [2021-03-10 15:01:31,242 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 15:01:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 3992 transitions. [2021-03-10 15:01:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:31,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:31,244 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 15:01:31,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 15:01:31,463 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1787483845, now seen corresponding path program 26 times [2021-03-10 15:01:31,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:31,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800403505] [2021-03-10 15:01:31,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:31,539 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 15:01:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800403505] [2021-03-10 15:01:31,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737822756] [2021-03-10 15:01:31,539 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 15:01:31,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 15:01:31,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 15:01:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:31,667 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 15:01:31,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:31,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:31,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660372262] [2021-03-10 15:01:31,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:31,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:31,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:31,669 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 15:01:31,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:31,890 INFO L93 Difference]: Finished difference Result 2342 states and 5956 transitions. [2021-03-10 15:01:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 15:01:31,890 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 15:01:31,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:31,892 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 15:01:31,893 INFO L226 Difference]: Without dead ends: 2072 [2021-03-10 15:01:31,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 15:01:31,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2072 states. [2021-03-10 15:01:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2072 to 1574. [2021-03-10 15:01:31,912 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 15:01:31,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 4292 transitions. [2021-03-10 15:01:31,914 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 4292 transitions. Word has length 69 [2021-03-10 15:01:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:31,914 INFO L480 AbstractCegarLoop]: Abstraction has 1574 states and 4292 transitions. [2021-03-10 15:01:31,915 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 15:01:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 4292 transitions. [2021-03-10 15:01:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:31,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:31,916 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 15:01:32,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 15:01:32,127 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:32,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:32,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2063810247, now seen corresponding path program 27 times [2021-03-10 15:01:32,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:32,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415925479] [2021-03-10 15:01:32,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:32,204 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 15:01:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415925479] [2021-03-10 15:01:32,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638015557] [2021-03-10 15:01:32,204 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 15:01:32,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 15:01:32,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:32,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 15:01:32,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:32,331 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 15:01:32,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:32,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-03-10 15:01:32,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670391734] [2021-03-10 15:01:32,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 15:01:32,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:32,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 15:01:32,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 15:01:32,332 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 15:01:32,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:32,605 INFO L93 Difference]: Finished difference Result 3065 states and 8058 transitions. [2021-03-10 15:01:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:32,605 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 15:01:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:32,609 INFO L225 Difference]: With dead ends: 3065 [2021-03-10 15:01:32,609 INFO L226 Difference]: Without dead ends: 2795 [2021-03-10 15:01:32,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 15:01:32,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2021-03-10 15:01:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 1749. [2021-03-10 15:01:32,632 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 15:01:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 4848 transitions. [2021-03-10 15:01:32,634 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 4848 transitions. Word has length 69 [2021-03-10 15:01:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:32,634 INFO L480 AbstractCegarLoop]: Abstraction has 1749 states and 4848 transitions. [2021-03-10 15:01:32,634 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 15:01:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 4848 transitions. [2021-03-10 15:01:32,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-03-10 15:01:32,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:32,636 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 15:01:32,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:32,849 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:32,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:32,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1404237507, now seen corresponding path program 28 times [2021-03-10 15:01:32,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:32,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676149210] [2021-03-10 15:01:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 15:01:32,926 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 15:01:32,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676149210] [2021-03-10 15:01:32,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261655472] [2021-03-10 15:01:32,927 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 15:01:32,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 15:01:32,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 15:01:32,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 15:01:32,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 15:01:33,053 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 15:01:33,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 15:01:33,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 15:01:33,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802892188] [2021-03-10 15:01:33,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 15:01:33,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 15:01:33,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 15:01:33,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 15:01:33,054 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 15:01:33,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 15:01:33,387 INFO L93 Difference]: Finished difference Result 2438 states and 6466 transitions. [2021-03-10 15:01:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 15:01:33,388 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 15:01:33,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 15:01:33,390 INFO L225 Difference]: With dead ends: 2438 [2021-03-10 15:01:33,390 INFO L226 Difference]: Without dead ends: 2027 [2021-03-10 15:01:33,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 15:01:33,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-03-10 15:01:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1263. [2021-03-10 15:01:33,405 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 15:01:33,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3384 transitions. [2021-03-10 15:01:33,407 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3384 transitions. Word has length 69 [2021-03-10 15:01:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 15:01:33,407 INFO L480 AbstractCegarLoop]: Abstraction has 1263 states and 3384 transitions. [2021-03-10 15:01:33,407 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 15:01:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3384 transitions. [2021-03-10 15:01:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-03-10 15:01:33,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 15:01:33,408 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 15:01:33,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 15:01:33,624 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-10 15:01:33,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 15:01:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash 925994951, now seen corresponding path program 29 times [2021-03-10 15:01:33,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 15:01:33,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858914279] [2021-03-10 15:01:33,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 15:01:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 15:01:33,634 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 15:01:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-10 15:01:33,642 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-10 15:01:33,671 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-10 15:01:33,671 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-10 15:01:33,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-03-10 15:01:33,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 03:01:33 BasicIcfg [2021-03-10 15:01:33,738 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 15:01:33,738 INFO L168 Benchmark]: Toolchain (without parser) took 22874.77 ms. Allocated memory was 255.9 MB in the beginning and 557.8 MB in the end (delta: 302.0 MB). Free memory was 235.4 MB in the beginning and 280.9 MB in the end (delta: -45.5 MB). Peak memory consumption was 256.0 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 353.18 ms. Allocated memory was 255.9 MB in the beginning and 381.7 MB in the end (delta: 125.8 MB). Free memory was 234.8 MB in the beginning and 346.3 MB in the end (delta: -111.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.65 ms. Allocated memory is still 381.7 MB. Free memory was 346.2 MB in the beginning and 344.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: Boogie Preprocessor took 15.35 ms. Allocated memory is still 381.7 MB. Free memory was 344.4 MB in the beginning and 342.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: RCFGBuilder took 343.22 ms. Allocated memory is still 381.7 MB. Free memory was 342.9 MB in the beginning and 361.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L168 Benchmark]: TraceAbstraction took 22130.65 ms. Allocated memory was 381.7 MB in the beginning and 557.8 MB in the end (delta: 176.2 MB). Free memory was 360.5 MB in the beginning and 280.9 MB in the end (delta: 79.5 MB). Peak memory consumption was 255.4 MB. Max. memory is 16.0 GB. [2021-03-10 15:01:33,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 353.18 ms. Allocated memory was 255.9 MB in the beginning and 381.7 MB in the end (delta: 125.8 MB). Free memory was 234.8 MB in the beginning and 346.3 MB in the end (delta: -111.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.65 ms. Allocated memory is still 381.7 MB. Free memory was 346.2 MB in the beginning and 344.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.35 ms. Allocated memory is still 381.7 MB. Free memory was 344.4 MB in the beginning and 342.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 343.22 ms. Allocated memory is still 381.7 MB. Free memory was 342.9 MB in the beginning and 361.2 MB in the end (delta: -18.3 MB). Peak memory consumption was 20.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 22130.65 ms. Allocated memory was 381.7 MB in the beginning and 557.8 MB in the end (delta: 176.2 MB). Free memory was 360.5 MB in the beginning and 280.9 MB in the end (delta: 79.5 MB). Peak memory consumption was 255.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21964.4ms, OverallIterations: 39, TraceHistogramMax: 5, EmptinessCheckTime: 108.9ms, AutomataDifference: 6723.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 80.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3221 SDtfs, 11853 SDslu, 18934 SDs, 0 SdLazy, 3620 SolverSat, 1248 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1669.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2568 GetRequests, 1762 SyntacticMatches, 0 SemanticMatches, 806 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3983 ImplicationChecksByTransitivity, 5330.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1749occurred in iteration=37, InterpolantAutomatonStates: 698, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 940.4ms AutomataMinimizationTime, 38 MinimizatonAttempts, 20151 StatesRemovedByMinimization, 38 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 291.4ms SsaConstructionTime, 730.9ms SatisfiabilityAnalysisTime, 5251.5ms InterpolantComputationTime, 3784 NumberOfCodeBlocks, 3784 NumberOfCodeBlocksAsserted, 123 NumberOfCheckSat, 3641 ConstructedInterpolants, 0 QuantifiedInterpolants, 13723 SizeOfPredicates, 234 NumberOfNonLiveVariables, 4266 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 69 InterpolantComputations, 7 PerfectInterpolantSequences, 16/1702 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...