/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 07:28:38,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 07:28:38,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 07:28:38,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 07:28:38,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 07:28:38,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 07:28:38,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 07:28:38,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 07:28:38,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 07:28:38,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 07:28:38,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 07:28:38,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 07:28:38,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 07:28:38,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 07:28:38,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 07:28:38,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 07:28:38,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 07:28:38,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 07:28:38,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 07:28:38,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 07:28:38,253 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-Separate.epf [2021-06-05 07:28:38,271 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 07:28:38,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 07:28:38,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 07:28:38,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 07:28:38,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 07:28:38,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 07:28:38,273 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 07:28:38,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 07:28:38,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 07:28:38,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 07:28:38,275 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 07:28:38,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 07:28:38,275 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 07:28:38,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 07:28:38,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:28:38,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 07:28:38,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 07:28:38,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 07:28:38,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 07:28:38,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 07:28:38,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 07:28:38,594 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 07:28:38,595 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 07:28:38,595 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-05 07:28:38,665 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d339a3bba/79f6f2c78a1c47dabedb0d10a8f26a83/FLAG97d04a4f8 [2021-06-05 07:28:39,208 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 07:28:39,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-05 07:28:39,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d339a3bba/79f6f2c78a1c47dabedb0d10a8f26a83/FLAG97d04a4f8 [2021-06-05 07:28:39,554 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d339a3bba/79f6f2c78a1c47dabedb0d10a8f26a83 [2021-06-05 07:28:39,559 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 07:28:39,561 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 07:28:39,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 07:28:39,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 07:28:39,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 07:28:39,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:28:39" (1/1) ... [2021-06-05 07:28:39,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ebdf60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:39, skipping insertion in model container [2021-06-05 07:28:39,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 07:28:39" (1/1) ... [2021-06-05 07:28:39,575 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 07:28:39,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 07:28:39,913 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-05 07:28:39,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:28:39,924 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 07:28:39,961 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-05 07:28:39,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 07:28:40,021 INFO L208 MainTranslator]: Completed translation [2021-06-05 07:28:40,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40 WrapperNode [2021-06-05 07:28:40,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 07:28:40,022 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 07:28:40,024 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 07:28:40,024 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 07:28:40,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,073 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 07:28:40,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 07:28:40,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 07:28:40,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 07:28:40,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,085 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,103 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... [2021-06-05 07:28:40,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 07:28:40,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 07:28:40,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 07:28:40,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 07:28:40,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 07:28:40,181 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 07:28:40,182 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 07:28:40,182 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 07:28:40,183 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 07:28:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 07:28:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 07:28:40,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 07:28:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 07:28:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 07:28:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 07:28:40,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 07:28:40,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 07:28:40,186 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 07:28:40,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 07:28:40,590 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 07:28:40,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:28:40 BoogieIcfgContainer [2021-06-05 07:28:40,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 07:28:40,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 07:28:40,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 07:28:40,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 07:28:40,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 07:28:39" (1/3) ... [2021-06-05 07:28:40,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681d135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:28:40, skipping insertion in model container [2021-06-05 07:28:40,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 07:28:40" (2/3) ... [2021-06-05 07:28:40,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1681d135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 07:28:40, skipping insertion in model container [2021-06-05 07:28:40,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 07:28:40" (3/3) ... [2021-06-05 07:28:40,598 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-06-05 07:28:40,603 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 07:28:40,606 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 07:28:40,607 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 07:28:40,607 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 07:28:40,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,640 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,640 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,641 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,642 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,643 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,644 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,644 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,645 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,645 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,645 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,645 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,646 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,646 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,646 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,647 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,647 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,648 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,649 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,650 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,650 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,650 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,650 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,652 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,652 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,653 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,653 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,653 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,654 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,654 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,655 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,656 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,657 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,657 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,662 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,662 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,663 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,663 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 07:28:40,664 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 07:28:40,685 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 07:28:40,700 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 07:28:40,700 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 07:28:40,700 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 07:28:40,700 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 07:28:40,700 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 07:28:40,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 07:28:40,701 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 07:28:40,701 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 07:28:40,709 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-05 07:28:40,803 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:40,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:40,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 07:28:40,822 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:40,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:40,823 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:40,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-05 07:28:40,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:40,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415291585] [2021-06-05 07:28:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:41,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:41,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415291585] [2021-06-05 07:28:41,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415291585] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:41,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:41,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 07:28:41,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122910824] [2021-06-05 07:28:41,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 07:28:41,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:41,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 07:28:41,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 07:28:41,255 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:41,482 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-05 07:28:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:28:41,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 07:28:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:41,502 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 07:28:41,502 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 07:28:41,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:28:41,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 07:28:41,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-05 07:28:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-05 07:28:41,619 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-05 07:28:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:41,619 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-05 07:28:41,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-05 07:28:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:28:41,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:41,628 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:41,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 07:28:41,628 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-06-05 07:28:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:41,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171236612] [2021-06-05 07:28:41,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:41,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:41,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171236612] [2021-06-05 07:28:41,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171236612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:41,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:41,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:28:41,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32544211] [2021-06-05 07:28:41,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:28:41,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:41,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:28:41,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:28:41,831 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:41,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:41,962 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-05 07:28:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:28:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:28:41,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:41,974 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 07:28:41,974 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 07:28:41,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:28:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 07:28:42,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-05 07:28:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-05 07:28:42,028 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-05 07:28:42,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:42,030 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-05 07:28:42,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-05 07:28:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:28:42,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:42,032 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:42,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 07:28:42,032 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-05 07:28:42,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:42,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267945780] [2021-06-05 07:28:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:42,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:42,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:42,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267945780] [2021-06-05 07:28:42,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267945780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:42,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:42,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:28:42,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883500317] [2021-06-05 07:28:42,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:28:42,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:42,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:28:42,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:28:42,182 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:42,331 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-05 07:28:42,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 07:28:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:28:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:42,339 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 07:28:42,340 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 07:28:42,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 07:28:42,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 07:28:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-05 07:28:42,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-05 07:28:42,377 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-05 07:28:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:42,378 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-05 07:28:42,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-05 07:28:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 07:28:42,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:42,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:42,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 07:28:42,382 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:42,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-05 07:28:42,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:42,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671322648] [2021-06-05 07:28:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:42,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:42,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671322648] [2021-06-05 07:28:42,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671322648] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:42,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:42,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 07:28:42,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767682139] [2021-06-05 07:28:42,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 07:28:42,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:42,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 07:28:42,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 07:28:42,490 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:42,601 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-05 07:28:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 07:28:42,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 07:28:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:42,610 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 07:28:42,610 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 07:28:42,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 07:28:42,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 07:28:42,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-05 07:28:42,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-05 07:28:42,650 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-05 07:28:42,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:42,651 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-05 07:28:42,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-05 07:28:42,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 07:28:42,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:42,653 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:42,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 07:28:42,654 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:42,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:42,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-06-05 07:28:42,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:42,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808454646] [2021-06-05 07:28:42,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:42,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:42,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808454646] [2021-06-05 07:28:42,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808454646] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:42,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:42,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:28:42,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541335738] [2021-06-05 07:28:42,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:28:42,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:28:42,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:28:42,737 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:42,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:42,817 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-06-05 07:28:42,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 07:28:42,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 42 [2021-06-05 07:28:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:42,827 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 07:28:42,827 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 07:28:42,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 07:28:42,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 07:28:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-06-05 07:28:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-06-05 07:28:42,869 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-06-05 07:28:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:42,869 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-06-05 07:28:42,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-06-05 07:28:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 07:28:42,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:42,871 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:42,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 07:28:42,871 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:42,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:42,872 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-06-05 07:28:42,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:42,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168370699] [2021-06-05 07:28:42,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:42,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:42,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168370699] [2021-06-05 07:28:42,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168370699] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:42,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:42,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:28:42,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296847720] [2021-06-05 07:28:42,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:28:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:42,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:28:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:28:42,945 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:43,142 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-06-05 07:28:43,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:28:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 42 [2021-06-05 07:28:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:43,153 INFO L225 Difference]: With dead ends: 2907 [2021-06-05 07:28:43,153 INFO L226 Difference]: Without dead ends: 2461 [2021-06-05 07:28:43,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:28:43,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-06-05 07:28:43,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-06-05 07:28:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-06-05 07:28:43,240 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-06-05 07:28:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:43,241 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-06-05 07:28:43,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-06-05 07:28:43,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 07:28:43,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:43,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:43,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 07:28:43,244 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:43,245 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-06-05 07:28:43,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:43,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225127158] [2021-06-05 07:28:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:43,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:43,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:43,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225127158] [2021-06-05 07:28:43,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225127158] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 07:28:43,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 07:28:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 07:28:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440518014] [2021-06-05 07:28:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 07:28:43,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 07:28:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 07:28:43,327 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:43,497 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-06-05 07:28:43,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:28:43,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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 42 [2021-06-05 07:28:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:43,509 INFO L225 Difference]: With dead ends: 3149 [2021-06-05 07:28:43,510 INFO L226 Difference]: Without dead ends: 2834 [2021-06-05 07:28:43,510 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:43,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-06-05 07:28:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-06-05 07:28:43,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-06-05 07:28:43,566 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-06-05 07:28:43,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:43,566 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-06-05 07:28:43,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 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) [2021-06-05 07:28:43,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-06-05 07:28:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:43,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:43,569 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:43,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 07:28:43,570 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:43,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:43,570 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-06-05 07:28:43,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:43,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709864671] [2021-06-05 07:28:43,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:43,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709864671] [2021-06-05 07:28:43,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709864671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:43,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516982944] [2021-06-05 07:28:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:43,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:44,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516982944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:44,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:44,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:44,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815757006] [2021-06-05 07:28:44,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:44,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:44,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:44,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:44,060 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:44,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:44,290 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-06-05 07:28:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:28:44,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:44,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:44,302 INFO L225 Difference]: With dead ends: 3261 [2021-06-05 07:28:44,303 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 07:28:44,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:28:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 07:28:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-06-05 07:28:44,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-06-05 07:28:44,380 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-06-05 07:28:44,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:44,381 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-06-05 07:28:44,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-06-05 07:28:44,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:44,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:44,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:44,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 07:28:44,601 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-06-05 07:28:44,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:44,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620679380] [2021-06-05 07:28:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:44,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:44,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620679380] [2021-06-05 07:28:44,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620679380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:44,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459300313] [2021-06-05 07:28:44,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:44,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:28:44,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:44,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:45,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459300313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:45,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:45,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:45,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714364440] [2021-06-05 07:28:45,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:45,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:45,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:45,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:45,019 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:45,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:45,211 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-06-05 07:28:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 07:28:45,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:45,220 INFO L225 Difference]: With dead ends: 3013 [2021-06-05 07:28:45,220 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 07:28:45,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 07:28:45,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 07:28:45,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-06-05 07:28:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-06-05 07:28:45,281 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-06-05 07:28:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:45,282 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-06-05 07:28:45,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-06-05 07:28:45,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:45,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:45,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:45,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:45,501 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:45,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:45,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-06-05 07:28:45,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:45,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206043772] [2021-06-05 07:28:45,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:45,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:45,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206043772] [2021-06-05 07:28:45,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206043772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:45,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631539642] [2021-06-05 07:28:45,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:45,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 07:28:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:45,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:45,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:45,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631539642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:45,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:45,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:45,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784169348] [2021-06-05 07:28:45,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:45,899 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:46,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:46,162 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-06-05 07:28:46,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:28:46,163 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:46,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:46,174 INFO L225 Difference]: With dead ends: 3525 [2021-06-05 07:28:46,174 INFO L226 Difference]: Without dead ends: 3045 [2021-06-05 07:28:46,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:28:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-06-05 07:28:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-06-05 07:28:46,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:46,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-06-05 07:28:46,250 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-06-05 07:28:46,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:46,250 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-06-05 07:28:46,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:46,250 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-06-05 07:28:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:46,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:46,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:46,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 07:28:46,473 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:46,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:46,473 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-06-05 07:28:46,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:46,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280290131] [2021-06-05 07:28:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:46,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280290131] [2021-06-05 07:28:46,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280290131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:46,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358499515] [2021-06-05 07:28:46,570 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:46,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:28:46,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:46,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358499515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:46,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:46,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:46,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128371249] [2021-06-05 07:28:46,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:46,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:46,859 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:47,251 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-06-05 07:28:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:28:47,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:47,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:47,260 INFO L225 Difference]: With dead ends: 4570 [2021-06-05 07:28:47,261 INFO L226 Difference]: Without dead ends: 3833 [2021-06-05 07:28:47,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 349.2ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:28:47,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-06-05 07:28:47,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-06-05 07:28:47,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-06-05 07:28:47,321 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-06-05 07:28:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:47,321 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-06-05 07:28:47,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-06-05 07:28:47,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:47,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:47,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:47,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:47,549 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:47,550 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-06-05 07:28:47,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:47,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778126588] [2021-06-05 07:28:47,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:47,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:47,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778126588] [2021-06-05 07:28:47,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778126588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:47,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122082660] [2021-06-05 07:28:47,653 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:47,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:28:47,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:47,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:47,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122082660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:47,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:47,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:47,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067511912] [2021-06-05 07:28:47,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:47,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:47,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:47,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:47,918 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:48,220 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-06-05 07:28:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:28:48,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:48,230 INFO L225 Difference]: With dead ends: 4350 [2021-06-05 07:28:48,230 INFO L226 Difference]: Without dead ends: 3958 [2021-06-05 07:28:48,230 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:28:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-06-05 07:28:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-06-05 07:28:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-06-05 07:28:48,297 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-06-05 07:28:48,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:48,298 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-06-05 07:28:48,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:48,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-06-05 07:28:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 07:28:48,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:48,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:48,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:48,517 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:48,517 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-06-05 07:28:48,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:48,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446250287] [2021-06-05 07:28:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:48,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446250287] [2021-06-05 07:28:48,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446250287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:48,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557145840] [2021-06-05 07:28:48,596 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:48,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 07:28:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:48,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 07:28:48,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557145840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:48,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:48,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 07:28:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713679800] [2021-06-05 07:28:48,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 07:28:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 07:28:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 07:28:48,848 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:49,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:49,469 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-06-05 07:28:49,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 07:28:49,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 07:28:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:49,478 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 07:28:49,478 INFO L226 Difference]: Without dead ends: 4898 [2021-06-05 07:28:49,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 530.5ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:28:49,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-05 07:28:49,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-06-05 07:28:49,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-06-05 07:28:49,555 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-06-05 07:28:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:49,555 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-06-05 07:28:49,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:49,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-06-05 07:28:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:49,560 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:49,560 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:49,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:49,784 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-06-05 07:28:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:49,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718452369] [2021-06-05 07:28:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:49,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:49,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718452369] [2021-06-05 07:28:49,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718452369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:49,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671440398] [2021-06-05 07:28:49,888 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:49,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:49,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:50,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671440398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:50,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:50,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:28:50,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935979349] [2021-06-05 07:28:50,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:28:50,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:28:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:28:50,158 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:50,427 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-06-05 07:28:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:28:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:50,435 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 07:28:50,435 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 07:28:50,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:28:50,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 07:28:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-06-05 07:28:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-06-05 07:28:50,499 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-06-05 07:28:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:50,499 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-06-05 07:28:50,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-06-05 07:28:50,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:50,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:50,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:50,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 07:28:50,727 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:50,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-06-05 07:28:50,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:50,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544373879] [2021-06-05 07:28:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:50,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:50,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544373879] [2021-06-05 07:28:50,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544373879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:50,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586540950] [2021-06-05 07:28:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:50,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:50,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:51,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586540950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:51,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:51,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:51,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515839103] [2021-06-05 07:28:51,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:51,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:51,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:51,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:51,102 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:51,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:51,357 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-06-05 07:28:51,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:28:51,358 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:51,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:51,366 INFO L225 Difference]: With dead ends: 4087 [2021-06-05 07:28:51,366 INFO L226 Difference]: Without dead ends: 3935 [2021-06-05 07:28:51,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:28:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-05 07:28:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2982. [2021-06-05 07:28:51,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-06-05 07:28:51,434 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-06-05 07:28:51,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:51,435 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-06-05 07:28:51,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:51,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-06-05 07:28:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:51,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:51,440 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:51,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 07:28:51,661 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-06-05 07:28:51,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:51,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704407513] [2021-06-05 07:28:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:51,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:51,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:51,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704407513] [2021-06-05 07:28:51,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704407513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:51,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233093772] [2021-06-05 07:28:51,758 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:51,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:28:51,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:52,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233093772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:52,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:52,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:52,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469119168] [2021-06-05 07:28:52,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:52,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:52,015 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:52,192 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-06-05 07:28:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 07:28:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:52,201 INFO L225 Difference]: With dead ends: 3927 [2021-06-05 07:28:52,201 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 07:28:52,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 227.5ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-06-05 07:28:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 07:28:52,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2981. [2021-06-05 07:28:52,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-06-05 07:28:52,260 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-06-05 07:28:52,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:52,260 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-06-05 07:28:52,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-06-05 07:28:52,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:52,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:52,267 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:52,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 07:28:52,481 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:52,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:52,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-06-05 07:28:52,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:52,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000887560] [2021-06-05 07:28:52,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000887560] [2021-06-05 07:28:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000887560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:52,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476634521] [2021-06-05 07:28:52,573 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:52,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:28:52,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:52,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:52,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476634521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:52,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:52,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:28:52,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710899848] [2021-06-05 07:28:52,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:28:52,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:52,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:28:52,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:28:52,849 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:53,159 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-06-05 07:28:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:28:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:53,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:53,169 INFO L225 Difference]: With dead ends: 4796 [2021-06-05 07:28:53,170 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 07:28:53,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-06-05 07:28:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 07:28:53,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-06-05 07:28:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-06-05 07:28:53,234 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-06-05 07:28:53,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:53,234 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-06-05 07:28:53,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:53,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-06-05 07:28:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:53,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:53,239 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:53,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 07:28:53,457 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:53,457 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-06-05 07:28:53,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:53,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936883871] [2021-06-05 07:28:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:53,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936883871] [2021-06-05 07:28:53,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936883871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:53,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393875565] [2021-06-05 07:28:53,546 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:53,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:28:53,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:53,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:53,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:53,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393875565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:53,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:53,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 07:28:53,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294889475] [2021-06-05 07:28:53,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 07:28:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 07:28:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 07:28:53,811 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:54,182 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-06-05 07:28:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 07:28:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:54,191 INFO L225 Difference]: With dead ends: 5543 [2021-06-05 07:28:54,191 INFO L226 Difference]: Without dead ends: 5063 [2021-06-05 07:28:54,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 324.9ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:28:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-06-05 07:28:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-06-05 07:28:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-06-05 07:28:54,266 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-06-05 07:28:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:54,266 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-06-05 07:28:54,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-06-05 07:28:54,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:54,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:54,270 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:54,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 07:28:54,494 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-06-05 07:28:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:54,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734235489] [2021-06-05 07:28:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:54,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734235489] [2021-06-05 07:28:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734235489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713540393] [2021-06-05 07:28:54,573 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:54,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:28:54,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:54,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713540393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:54,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:54,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:54,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50752351] [2021-06-05 07:28:54,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:54,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:54,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:54,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:54,840 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:55,461 INFO L93 Difference]: Finished difference Result 6220 states and 16674 transitions. [2021-06-05 07:28:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 07:28:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:55,470 INFO L225 Difference]: With dead ends: 6220 [2021-06-05 07:28:55,470 INFO L226 Difference]: Without dead ends: 5544 [2021-06-05 07:28:55,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 07:28:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5544 states. [2021-06-05 07:28:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5544 to 3235. [2021-06-05 07:28:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-06-05 07:28:55,551 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-06-05 07:28:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:55,551 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-06-05 07:28:55,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-06-05 07:28:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:55,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:55,556 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:55,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:55,769 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-06-05 07:28:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:55,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197363162] [2021-06-05 07:28:55,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:55,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197363162] [2021-06-05 07:28:55,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197363162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:55,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728089652] [2021-06-05 07:28:55,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:55,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:28:55,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:55,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:56,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728089652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:56,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:56,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:56,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305436975] [2021-06-05 07:28:56,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:56,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:56,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:56,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:56,074 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:56,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:56,402 INFO L93 Difference]: Finished difference Result 5014 states and 13181 transitions. [2021-06-05 07:28:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 07:28:56,403 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:56,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:56,409 INFO L225 Difference]: With dead ends: 5014 [2021-06-05 07:28:56,410 INFO L226 Difference]: Without dead ends: 4862 [2021-06-05 07:28:56,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 298.6ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:28:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-06-05 07:28:56,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 3275. [2021-06-05 07:28:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3275 states, 3274 states have (on average 2.775809407452657) internal successors, (9088), 3274 states have internal predecessors, (9088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3275 states to 3275 states and 9088 transitions. [2021-06-05 07:28:56,476 INFO L78 Accepts]: Start accepts. Automaton has 3275 states and 9088 transitions. Word has length 52 [2021-06-05 07:28:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:56,476 INFO L482 AbstractCegarLoop]: Abstraction has 3275 states and 9088 transitions. [2021-06-05 07:28:56,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 3275 states and 9088 transitions. [2021-06-05 07:28:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:56,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:56,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:56,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 07:28:56,703 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:56,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:56,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-06-05 07:28:56,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:56,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157494584] [2021-06-05 07:28:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:56,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:56,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157494584] [2021-06-05 07:28:56,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157494584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:56,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911074869] [2021-06-05 07:28:56,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:56,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:28:56,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:56,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:56,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:57,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911074869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:57,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:57,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:57,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26737038] [2021-06-05 07:28:57,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:57,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:57,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:57,046 INFO L87 Difference]: Start difference. First operand 3275 states and 9088 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:57,365 INFO L93 Difference]: Finished difference Result 5278 states and 14184 transitions. [2021-06-05 07:28:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 07:28:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:57,371 INFO L225 Difference]: With dead ends: 5278 [2021-06-05 07:28:57,371 INFO L226 Difference]: Without dead ends: 5126 [2021-06-05 07:28:57,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 328.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:28:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5126 states. [2021-06-05 07:28:57,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5126 to 3363. [2021-06-05 07:28:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-06-05 07:28:57,445 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-06-05 07:28:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:57,445 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-06-05 07:28:57,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-06-05 07:28:57,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 07:28:57,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:57,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:57,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:57,665 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-06-05 07:28:57,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:57,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141886933] [2021-06-05 07:28:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:57,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141886933] [2021-06-05 07:28:57,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141886933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:57,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728903293] [2021-06-05 07:28:57,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:57,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:28:57,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:57,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 07:28:57,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:57,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728903293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:57,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:57,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 07:28:57,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110903329] [2021-06-05 07:28:57,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 07:28:57,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:57,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 07:28:57,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 07:28:57,979 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:58,603 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-06-05 07:28:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 07:28:58,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 07:28:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:58,611 INFO L225 Difference]: With dead ends: 6683 [2021-06-05 07:28:58,611 INFO L226 Difference]: Without dead ends: 6253 [2021-06-05 07:28:58,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 07:28:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-06-05 07:28:58,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-06-05 07:28:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-06-05 07:28:58,686 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-06-05 07:28:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:58,687 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-06-05 07:28:58,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-06-05 07:28:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:28:58,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:58,692 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:58,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 07:28:58,916 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:58,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:58,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-06-05 07:28:58,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:58,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711727861] [2021-06-05 07:28:58,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:59,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711727861] [2021-06-05 07:28:59,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711727861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:59,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825335249] [2021-06-05 07:28:59,010 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:59,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:28:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:28:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:28:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825335249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:59,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:28:59,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:28:59,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631914235] [2021-06-05 07:28:59,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:28:59,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:28:59,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:28:59,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:28:59,274 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:59,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:28:59,467 INFO L93 Difference]: Finished difference Result 4779 states and 12701 transitions. [2021-06-05 07:28:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 07:28:59,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:28:59,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:28:59,474 INFO L225 Difference]: With dead ends: 4779 [2021-06-05 07:28:59,474 INFO L226 Difference]: Without dead ends: 4627 [2021-06-05 07:28:59,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 220.5ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-06-05 07:28:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4627 states. [2021-06-05 07:28:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4627 to 3492. [2021-06-05 07:28:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-06-05 07:28:59,539 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-06-05 07:28:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:28:59,539 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-06-05 07:28:59,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:28:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-06-05 07:28:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:28:59,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:28:59,544 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:28:59,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:59,757 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:28:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:28:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-06-05 07:28:59,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:28:59,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296563980] [2021-06-05 07:28:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:28:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:28:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:28:59,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:28:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296563980] [2021-06-05 07:28:59,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296563980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:28:59,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059154328] [2021-06-05 07:28:59,891 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:28:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:28:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:28:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:28:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:00,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059154328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:00,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:00,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:00,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628742582] [2021-06-05 07:29:00,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:00,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:00,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:00,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:00,195 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:00,466 INFO L93 Difference]: Finished difference Result 4955 states and 13053 transitions. [2021-06-05 07:29:00,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 07:29:00,466 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:00,472 INFO L225 Difference]: With dead ends: 4955 [2021-06-05 07:29:00,472 INFO L226 Difference]: Without dead ends: 4803 [2021-06-05 07:29:00,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 329.2ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:29:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4803 states. [2021-06-05 07:29:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4803 to 3492. [2021-06-05 07:29:00,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 2.75651675737611) internal successors, (9623), 3491 states have internal predecessors, (9623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 9623 transitions. [2021-06-05 07:29:00,536 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 9623 transitions. Word has length 57 [2021-06-05 07:29:00,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:00,536 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 9623 transitions. [2021-06-05 07:29:00,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:00,536 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 9623 transitions. [2021-06-05 07:29:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:00,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:00,541 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:00,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 07:29:00,757 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:00,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-06-05 07:29:00,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:00,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206880119] [2021-06-05 07:29:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:00,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:00,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206880119] [2021-06-05 07:29:00,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206880119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:00,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481285293] [2021-06-05 07:29:00,851 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:00,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 07:29:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:01,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481285293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:01,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:01,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:01,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590207263] [2021-06-05 07:29:01,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:01,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:01,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:01,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:01,135 INFO L87 Difference]: Start difference. First operand 3492 states and 9623 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:01,456 INFO L93 Difference]: Finished difference Result 5339 states and 13949 transitions. [2021-06-05 07:29:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:29:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:01,461 INFO L225 Difference]: With dead ends: 5339 [2021-06-05 07:29:01,461 INFO L226 Difference]: Without dead ends: 4947 [2021-06-05 07:29:01,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:29:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4947 states. [2021-06-05 07:29:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4947 to 3582. [2021-06-05 07:29:01,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3582 states, 3581 states have (on average 2.7402960067020383) internal successors, (9813), 3581 states have internal predecessors, (9813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3582 states to 3582 states and 9813 transitions. [2021-06-05 07:29:01,522 INFO L78 Accepts]: Start accepts. Automaton has 3582 states and 9813 transitions. Word has length 57 [2021-06-05 07:29:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:01,522 INFO L482 AbstractCegarLoop]: Abstraction has 3582 states and 9813 transitions. [2021-06-05 07:29:01,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:01,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3582 states and 9813 transitions. [2021-06-05 07:29:01,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:01,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:01,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:01,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 07:29:01,750 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:01,751 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-06-05 07:29:01,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:01,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755145222] [2021-06-05 07:29:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:01,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:01,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755145222] [2021-06-05 07:29:01,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755145222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:01,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694504007] [2021-06-05 07:29:01,850 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:01,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:01,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694504007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:02,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:02,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430713699] [2021-06-05 07:29:02,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:02,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:02,184 INFO L87 Difference]: Start difference. First operand 3582 states and 9813 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:02,455 INFO L93 Difference]: Finished difference Result 4949 states and 13043 transitions. [2021-06-05 07:29:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:29:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:02,459 INFO L225 Difference]: With dead ends: 4949 [2021-06-05 07:29:02,460 INFO L226 Difference]: Without dead ends: 4797 [2021-06-05 07:29:02,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 320.9ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:29:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-05 07:29:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3547. [2021-06-05 07:29:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.745628877608573) internal successors, (9736), 3546 states have internal predecessors, (9736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:02,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9736 transitions. [2021-06-05 07:29:02,515 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9736 transitions. Word has length 57 [2021-06-05 07:29:02,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:02,515 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9736 transitions. [2021-06-05 07:29:02,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:02,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9736 transitions. [2021-06-05 07:29:02,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:02,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:02,520 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:02,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:02,737 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:02,737 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-06-05 07:29:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:02,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909209651] [2021-06-05 07:29:02,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:02,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:02,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909209651] [2021-06-05 07:29:02,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909209651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:02,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815552649] [2021-06-05 07:29:02,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:02,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:29:02,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:02,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:02,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:03,104 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:03,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815552649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:03,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:03,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113764196] [2021-06-05 07:29:03,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:03,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:03,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:03,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:03,106 INFO L87 Difference]: Start difference. First operand 3547 states and 9736 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:03,398 INFO L93 Difference]: Finished difference Result 5131 states and 13405 transitions. [2021-06-05 07:29:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 07:29:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:03,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:03,404 INFO L225 Difference]: With dead ends: 5131 [2021-06-05 07:29:03,404 INFO L226 Difference]: Without dead ends: 4979 [2021-06-05 07:29:03,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-06-05 07:29:03,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4979 states. [2021-06-05 07:29:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4979 to 3652. [2021-06-05 07:29:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 2.7299370035606683) internal successors, (9967), 3651 states have internal predecessors, (9967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 9967 transitions. [2021-06-05 07:29:03,450 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 9967 transitions. Word has length 57 [2021-06-05 07:29:03,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:03,450 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 9967 transitions. [2021-06-05 07:29:03,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:03,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 9967 transitions. [2021-06-05 07:29:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:03,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:03,455 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:03,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 07:29:03,657 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-06-05 07:29:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419396742] [2021-06-05 07:29:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:03,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:03,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419396742] [2021-06-05 07:29:03,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419396742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:03,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278075144] [2021-06-05 07:29:03,750 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:03,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 07:29:03,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:03,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:04,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278075144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:04,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:04,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:04,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51227658] [2021-06-05 07:29:04,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:04,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:04,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:04,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:04,040 INFO L87 Difference]: Start difference. First operand 3652 states and 9967 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:04,402 INFO L93 Difference]: Finished difference Result 5235 states and 13613 transitions. [2021-06-05 07:29:04,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 07:29:04,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:04,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:04,408 INFO L225 Difference]: With dead ends: 5235 [2021-06-05 07:29:04,408 INFO L226 Difference]: Without dead ends: 5083 [2021-06-05 07:29:04,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 367.6ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 07:29:04,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5083 states. [2021-06-05 07:29:04,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5083 to 3636. [2021-06-05 07:29:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.730123796423659) internal successors, (9924), 3635 states have internal predecessors, (9924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 9924 transitions. [2021-06-05 07:29:04,465 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 9924 transitions. Word has length 57 [2021-06-05 07:29:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:04,466 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 9924 transitions. [2021-06-05 07:29:04,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 9924 transitions. [2021-06-05 07:29:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:04,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:04,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:04,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 07:29:04,690 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:04,690 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-06-05 07:29:04,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:04,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243898364] [2021-06-05 07:29:04,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:04,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243898364] [2021-06-05 07:29:04,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243898364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:04,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192978631] [2021-06-05 07:29:04,787 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:04,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:29:04,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192978631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:05,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:05,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:05,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990801353] [2021-06-05 07:29:05,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:05,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:05,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:05,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:05,054 INFO L87 Difference]: Start difference. First operand 3636 states and 9924 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:05,388 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-06-05 07:29:05,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 07:29:05,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:05,394 INFO L225 Difference]: With dead ends: 5219 [2021-06-05 07:29:05,394 INFO L226 Difference]: Without dead ends: 5067 [2021-06-05 07:29:05,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 07:29:05,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-06-05 07:29:05,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3581. [2021-06-05 07:29:05,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 2.7391061452513967) internal successors, (9806), 3580 states have internal predecessors, (9806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:05,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 9806 transitions. [2021-06-05 07:29:05,450 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 9806 transitions. Word has length 57 [2021-06-05 07:29:05,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:05,450 INFO L482 AbstractCegarLoop]: Abstraction has 3581 states and 9806 transitions. [2021-06-05 07:29:05,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:05,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 9806 transitions. [2021-06-05 07:29:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:05,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:05,455 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:05,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:05,664 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:05,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:05,664 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-06-05 07:29:05,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:05,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410223531] [2021-06-05 07:29:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:05,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:05,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410223531] [2021-06-05 07:29:05,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410223531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:05,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048454139] [2021-06-05 07:29:05,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:05,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:05,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:06,046 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:06,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048454139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:06,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:06,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:06,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221034623] [2021-06-05 07:29:06,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:06,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:06,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:06,048 INFO L87 Difference]: Start difference. First operand 3581 states and 9806 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:06,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:06,228 INFO L93 Difference]: Finished difference Result 5043 states and 13229 transitions. [2021-06-05 07:29:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 07:29:06,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:06,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:06,235 INFO L225 Difference]: With dead ends: 5043 [2021-06-05 07:29:06,235 INFO L226 Difference]: Without dead ends: 4891 [2021-06-05 07:29:06,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-05 07:29:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4891 states. [2021-06-05 07:29:06,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4891 to 3556. [2021-06-05 07:29:06,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-05 07:29:06,283 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-05 07:29:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:06,283 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-05 07:29:06,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:06,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-05 07:29:06,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:06,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:06,289 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:06,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 07:29:06,499 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:06,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:06,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-06-05 07:29:06,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:06,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346801050] [2021-06-05 07:29:06,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:06,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346801050] [2021-06-05 07:29:06,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346801050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:06,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708517657] [2021-06-05 07:29:06,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:06,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 07:29:06,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:06,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:06,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:06,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708517657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:06,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:06,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:06,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174075906] [2021-06-05 07:29:06,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:06,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:06,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:06,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:06,856 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:07,125 INFO L93 Difference]: Finished difference Result 5339 states and 13821 transitions. [2021-06-05 07:29:07,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:29:07,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:07,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:07,133 INFO L225 Difference]: With dead ends: 5339 [2021-06-05 07:29:07,133 INFO L226 Difference]: Without dead ends: 5187 [2021-06-05 07:29:07,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-06-05 07:29:07,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2021-06-05 07:29:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3606. [2021-06-05 07:29:07,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.735367545076283) internal successors, (9861), 3605 states have internal predecessors, (9861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9861 transitions. [2021-06-05 07:29:07,192 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9861 transitions. Word has length 57 [2021-06-05 07:29:07,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:07,193 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9861 transitions. [2021-06-05 07:29:07,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9861 transitions. [2021-06-05 07:29:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:07,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:07,200 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:07,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:07,423 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:07,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:07,423 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-06-05 07:29:07,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:07,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333895932] [2021-06-05 07:29:07,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:07,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333895932] [2021-06-05 07:29:07,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333895932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:07,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077052735] [2021-06-05 07:29:07,512 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:07,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 07:29:07,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:07,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:07,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:07,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077052735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:07,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:07,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:07,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207951801] [2021-06-05 07:29:07,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:07,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:07,783 INFO L87 Difference]: Start difference. First operand 3606 states and 9861 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:08,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:08,186 INFO L93 Difference]: Finished difference Result 5859 states and 14989 transitions. [2021-06-05 07:29:08,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 07:29:08,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:08,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:08,194 INFO L225 Difference]: With dead ends: 5859 [2021-06-05 07:29:08,194 INFO L226 Difference]: Without dead ends: 5467 [2021-06-05 07:29:08,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 07:29:08,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2021-06-05 07:29:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 3631. [2021-06-05 07:29:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.73168044077135) internal successors, (9916), 3630 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:08,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9916 transitions. [2021-06-05 07:29:08,270 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9916 transitions. Word has length 57 [2021-06-05 07:29:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:08,270 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9916 transitions. [2021-06-05 07:29:08,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9916 transitions. [2021-06-05 07:29:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:08,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:08,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:08,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 07:29:08,498 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-06-05 07:29:08,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:08,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990759251] [2021-06-05 07:29:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:08,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990759251] [2021-06-05 07:29:08,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990759251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:08,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226013588] [2021-06-05 07:29:08,594 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:08,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:29:08,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:08,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:08,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:08,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:08,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226013588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:08,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:08,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 07:29:08,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239236050] [2021-06-05 07:29:08,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 07:29:08,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 07:29:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 07:29:08,883 INFO L87 Difference]: Start difference. First operand 3631 states and 9916 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:09,155 INFO L93 Difference]: Finished difference Result 5219 states and 13581 transitions. [2021-06-05 07:29:09,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 07:29:09,156 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:09,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:09,161 INFO L225 Difference]: With dead ends: 5219 [2021-06-05 07:29:09,161 INFO L226 Difference]: Without dead ends: 5067 [2021-06-05 07:29:09,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 07:29:09,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5067 states. [2021-06-05 07:29:09,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5067 to 3556. [2021-06-05 07:29:09,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-05 07:29:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-05 07:29:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-05 07:29:09,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-05 07:29:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:09,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:09,214 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:09,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 07:29:09,428 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:09,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:09,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-06-05 07:29:09,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:09,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190359798] [2021-06-05 07:29:09,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:09,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190359798] [2021-06-05 07:29:09,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190359798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:09,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139676748] [2021-06-05 07:29:09,511 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:09,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 07:29:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:09,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139676748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:09,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:09,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:09,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379596929] [2021-06-05 07:29:09,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:09,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:09,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:09,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:09,768 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:09,943 INFO L93 Difference]: Finished difference Result 5128 states and 13414 transitions. [2021-06-05 07:29:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 07:29:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:09,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:09,948 INFO L225 Difference]: With dead ends: 5128 [2021-06-05 07:29:09,948 INFO L226 Difference]: Without dead ends: 4976 [2021-06-05 07:29:09,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-05 07:29:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4976 states. [2021-06-05 07:29:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4976 to 3531. [2021-06-05 07:29:09,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-06-05 07:29:09,985 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-06-05 07:29:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:09,986 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-06-05 07:29:09,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-06-05 07:29:09,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:09,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:09,988 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:10,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:10,189 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:10,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:10,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-06-05 07:29:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:10,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102200954] [2021-06-05 07:29:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:10,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102200954] [2021-06-05 07:29:10,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102200954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:10,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052008719] [2021-06-05 07:29:10,304 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:10,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 07:29:10,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:10,553 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:10,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052008719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:10,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:10,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446926300] [2021-06-05 07:29:10,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:10,555 INFO L87 Difference]: Start difference. First operand 3531 states and 9696 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:10,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:10,802 INFO L93 Difference]: Finished difference Result 5384 states and 13926 transitions. [2021-06-05 07:29:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 07:29:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:10,807 INFO L225 Difference]: With dead ends: 5384 [2021-06-05 07:29:10,807 INFO L226 Difference]: Without dead ends: 5232 [2021-06-05 07:29:10,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-06-05 07:29:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2021-06-05 07:29:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 3556. [2021-06-05 07:29:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 2.742897327707454) internal successors, (9751), 3555 states have internal predecessors, (9751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 9751 transitions. [2021-06-05 07:29:10,857 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 9751 transitions. Word has length 57 [2021-06-05 07:29:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:10,857 INFO L482 AbstractCegarLoop]: Abstraction has 3556 states and 9751 transitions. [2021-06-05 07:29:10,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 9751 transitions. [2021-06-05 07:29:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:10,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:10,861 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:11,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:11,077 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:11,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:11,077 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-06-05 07:29:11,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:11,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645166121] [2021-06-05 07:29:11,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:11,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:11,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645166121] [2021-06-05 07:29:11,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645166121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:11,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436567173] [2021-06-05 07:29:11,155 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:11,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 07:29:11,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:11,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:11,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 07:29:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:11,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436567173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:11,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 07:29:11,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 07:29:11,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172237711] [2021-06-05 07:29:11,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 07:29:11,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 07:29:11,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 07:29:11,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 07:29:11,401 INFO L87 Difference]: Start difference. First operand 3556 states and 9751 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 07:29:11,605 INFO L93 Difference]: Finished difference Result 5113 states and 13389 transitions. [2021-06-05 07:29:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 07:29:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 07:29:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 07:29:11,610 INFO L225 Difference]: With dead ends: 5113 [2021-06-05 07:29:11,610 INFO L226 Difference]: Without dead ends: 4961 [2021-06-05 07:29:11,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 07:29:11,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-05 07:29:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3531. [2021-06-05 07:29:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 3530 states have (on average 2.746742209631728) internal successors, (9696), 3530 states have internal predecessors, (9696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:11,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 9696 transitions. [2021-06-05 07:29:11,652 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 9696 transitions. Word has length 57 [2021-06-05 07:29:11,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 07:29:11,653 INFO L482 AbstractCegarLoop]: Abstraction has 3531 states and 9696 transitions. [2021-06-05 07:29:11,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 07:29:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 9696 transitions. [2021-06-05 07:29:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 07:29:11,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 07:29:11,656 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 07:29:11,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 07:29:11,861 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 07:29:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 07:29:11,861 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-06-05 07:29:11,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 07:29:11,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804604782] [2021-06-05 07:29:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 07:29:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 07:29:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 07:29:11,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 07:29:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804604782] [2021-06-05 07:29:11,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804604782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 07:29:11,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118337355] [2021-06-05 07:29:11,949 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 07:29:12,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 07:29:12,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 07:29:12,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 07:29:12,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown