/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 17:52:58,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:52:58,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:52:58,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 17:52:58,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 17:52:58,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 17:52:58,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 17:52:58,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 17:52:58,477 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 17:52:58,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 17:52:58,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 17:52:58,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 17:52:58,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 17:52:58,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 17:52:58,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 17:52:58,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 17:52:58,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 17:52:58,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 17:52:58,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 17:52:58,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 17:52:58,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 17:52:58,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 17:52:58,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 17:52:58,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 17:52:58,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 17:52:58,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:52:58,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:52:58,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:52:58,510 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 17:52:58,532 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:52:58,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:52:58,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:52:58,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:52:58,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:52:58,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:52:58,533 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:52:58,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:52:58,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:52:58,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:58,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:52:58,535 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:52:58,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:52:58,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:52:58,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:52:58,759 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:52:58,760 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 17:52:58,761 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 17:52:58,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-06-05 17:52:58,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a3361200/fbd45ad87b624ce3a88d548184a3c1a0/FLAG9c10a14f5 [2021-06-05 17:52:59,193 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 17:52:59,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-2.i [2021-06-05 17:52:59,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a3361200/fbd45ad87b624ce3a88d548184a3c1a0/FLAG9c10a14f5 [2021-06-05 17:52:59,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a3361200/fbd45ad87b624ce3a88d548184a3c1a0 [2021-06-05 17:52:59,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:52:59,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 17:52:59,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:59,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 17:52:59,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 17:52:59,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589c94ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59, skipping insertion in model container [2021-06-05 17:52:59,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 17:52:59,629 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 17:52:59,818 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_longest-2.i[30286,30299] [2021-06-05 17:52:59,833 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_longest-2.i[31040,31053] [2021-06-05 17:52:59,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:59,840 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 17:52:59,872 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_longest-2.i[30286,30299] [2021-06-05 17:52:59,891 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_longest-2.i[31040,31053] [2021-06-05 17:52:59,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:59,929 INFO L208 MainTranslator]: Completed translation [2021-06-05 17:52:59,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59 WrapperNode [2021-06-05 17:52:59,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:59,931 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:59,931 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:52:59,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:52:59,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:59,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:52:59,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:52:59,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:52:59,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (1/1) ... [2021-06-05 17:52:59,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:52:59,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:52:59,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:52:59,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:52:59,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (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 17:53:00,023 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 17:53:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 17:53:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 17:53:00,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:53:00,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:53:00,025 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 17:53:00,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:53:00,322 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 17:53:00,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:53:00 BoogieIcfgContainer [2021-06-05 17:53:00,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:53:00,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:53:00,325 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:53:00,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:53:00,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 05:52:59" (1/3) ... [2021-06-05 17:53:00,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b60c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:53:00, skipping insertion in model container [2021-06-05 17:53:00,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:59" (2/3) ... [2021-06-05 17:53:00,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@340b60c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:53:00, skipping insertion in model container [2021-06-05 17:53:00,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:53:00" (3/3) ... [2021-06-05 17:53:00,329 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-2.i [2021-06-05 17:53:00,332 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:53:00,333 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:53:00,333 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:53:00,333 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:53:00,361 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,361 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,365 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,365 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,365 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,365 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,366 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,366 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,366 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,367 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,368 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,369 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,370 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,371 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,371 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,372 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,373 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,375 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,375 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,376 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,376 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,383 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,384 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,384 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,384 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,384 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,385 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:53:00,389 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 17:53:00,404 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:53:00,428 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:53:00,428 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:53:00,428 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:53:00,428 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:53:00,428 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:53:00,428 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:53:00,428 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:53:00,429 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 17:53:00,438 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-05 17:53:00,519 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 17:53:00,525 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 17:53:00,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 17:53:00,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,542 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:00,543 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:00,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1746009969, now seen corresponding path program 1 times [2021-06-05 17:53:00,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:00,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060963782] [2021-06-05 17:53:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,833 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 17:53:00,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:00,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060963782] [2021-06-05 17:53:00,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060963782] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:00,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:00,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 17:53:00,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530872435] [2021-06-05 17:53:00,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:53:00,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:53:00,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:53:00,861 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 17:53:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,034 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-05 17:53:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:53:01,036 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 17:53:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,059 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 17:53:01,059 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 17:53:01,061 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:53:01,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 17:53:01,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-05 17:53:01,153 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 17:53:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-05 17:53:01,158 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-05 17:53:01,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,158 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-05 17:53:01,158 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 17:53:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-05 17:53:01,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:53:01,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,164 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:53:01,165 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1710770003, now seen corresponding path program 1 times [2021-06-05 17:53:01,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049723389] [2021-06-05 17:53:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,304 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 17:53:01,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049723389] [2021-06-05 17:53:01,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049723389] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:01,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:01,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:53:01,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240390503] [2021-06-05 17:53:01,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:53:01,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:53:01,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:53:01,308 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 17:53:01,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,406 INFO L93 Difference]: Finished difference Result 2001 states and 5364 transitions. [2021-06-05 17:53:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:53:01,407 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 17:53:01,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,414 INFO L225 Difference]: With dead ends: 2001 [2021-06-05 17:53:01,414 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 17:53:01,415 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:53:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 17:53:01,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1304. [2021-06-05 17:53:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.7206446661550268) internal successors, (3545), 1303 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3545 transitions. [2021-06-05 17:53:01,444 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3545 transitions. Word has length 37 [2021-06-05 17:53:01,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,445 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3545 transitions. [2021-06-05 17:53:01,446 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 17:53:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3545 transitions. [2021-06-05 17:53:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:53:01,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,448 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:53:01,448 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1534224383, now seen corresponding path program 1 times [2021-06-05 17:53:01,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884046257] [2021-06-05 17:53:01,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,571 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 17:53:01,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884046257] [2021-06-05 17:53:01,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884046257] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:01,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:01,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:53:01,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418239090] [2021-06-05 17:53:01,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:53:01,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:53:01,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:53:01,573 INFO L87 Difference]: Start difference. First operand 1304 states and 3545 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 17:53:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,664 INFO L93 Difference]: Finished difference Result 2270 states and 6052 transitions. [2021-06-05 17:53:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:53:01,664 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 17:53:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,670 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 17:53:01,671 INFO L226 Difference]: Without dead ends: 2003 [2021-06-05 17:53:01,671 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:53:01,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-06-05 17:53:01,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1514. [2021-06-05 17:53:01,696 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 17:53:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-05 17:53:01,700 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-05 17:53:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,700 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-05 17:53:01,700 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 17:53:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-05 17:53:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:01,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,702 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:53:01,702 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash -276543295, now seen corresponding path program 1 times [2021-06-05 17:53:01,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573531703] [2021-06-05 17:53:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,756 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 17:53:01,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573531703] [2021-06-05 17:53:01,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573531703] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:01,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:01,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:53:01,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872227472] [2021-06-05 17:53:01,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:53:01,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:53:01,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:53:01,758 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 17:53:01,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,846 INFO L93 Difference]: Finished difference Result 2443 states and 6548 transitions. [2021-06-05 17:53:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:53:01,847 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 17:53:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,854 INFO L225 Difference]: With dead ends: 2443 [2021-06-05 17:53:01,854 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 17:53:01,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:01,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 17:53:01,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1544. [2021-06-05 17:53:01,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.73298768632534) internal successors, (4217), 1543 states have internal predecessors, (4217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4217 transitions. [2021-06-05 17:53:01,887 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4217 transitions. Word has length 42 [2021-06-05 17:53:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,888 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4217 transitions. [2021-06-05 17:53:01,889 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 17:53:01,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4217 transitions. [2021-06-05 17:53:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:01,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,891 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:53:01,891 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1621234243, now seen corresponding path program 2 times [2021-06-05 17:53:01,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774232292] [2021-06-05 17:53:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,975 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 17:53:01,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774232292] [2021-06-05 17:53:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774232292] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:01,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:01,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:53:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269961143] [2021-06-05 17:53:01,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:53:01,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:53:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:53:01,977 INFO L87 Difference]: Start difference. First operand 1544 states and 4217 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 17:53:02,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,034 INFO L93 Difference]: Finished difference Result 2275 states and 6028 transitions. [2021-06-05 17:53:02,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:53:02,035 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 17:53:02,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,042 INFO L225 Difference]: With dead ends: 2275 [2021-06-05 17:53:02,042 INFO L226 Difference]: Without dead ends: 2123 [2021-06-05 17:53:02,042 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:53:02,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-05 17:53:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1569. [2021-06-05 17:53:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.7244897959183674) internal successors, (4272), 1568 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 4272 transitions. [2021-06-05 17:53:02,075 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 4272 transitions. Word has length 42 [2021-06-05 17:53:02,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,076 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 4272 transitions. [2021-06-05 17:53:02,076 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 17:53:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 4272 transitions. [2021-06-05 17:53:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:02,077 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,078 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 17:53:02,078 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,078 INFO L82 PathProgramCache]: Analyzing trace with hash 858791553, now seen corresponding path program 3 times [2021-06-05 17:53:02,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756121931] [2021-06-05 17:53:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,152 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 17:53:02,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756121931] [2021-06-05 17:53:02,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756121931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:53:02,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:53:02,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:53:02,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865113804] [2021-06-05 17:53:02,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:53:02,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:53:02,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:53:02,153 INFO L87 Difference]: Start difference. First operand 1569 states and 4272 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 17:53:02,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,260 INFO L93 Difference]: Finished difference Result 2904 states and 7740 transitions. [2021-06-05 17:53:02,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:53:02,260 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 17:53:02,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,269 INFO L225 Difference]: With dead ends: 2904 [2021-06-05 17:53:02,269 INFO L226 Difference]: Without dead ends: 2589 [2021-06-05 17:53:02,270 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:02,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-05 17:53:02,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1746. [2021-06-05 17:53:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.7283667621776506) internal successors, (4761), 1745 states have internal predecessors, (4761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 4761 transitions. [2021-06-05 17:53:02,303 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 4761 transitions. Word has length 42 [2021-06-05 17:53:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,303 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 4761 transitions. [2021-06-05 17:53:02,303 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 17:53:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 4761 transitions. [2021-06-05 17:53:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:53:02,305 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,305 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 17:53:02,306 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,306 INFO L82 PathProgramCache]: Analyzing trace with hash -502364404, now seen corresponding path program 1 times [2021-06-05 17:53:02,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010021913] [2021-06-05 17:53:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,402 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 17:53:02,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010021913] [2021-06-05 17:53:02,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010021913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541279734] [2021-06-05 17:53:02,402 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 17:53:02,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:02,744 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 17:53:02,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541279734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:02,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:53:02,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851353710] [2021-06-05 17:53:02,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:02,747 INFO L87 Difference]: Start difference. First operand 1746 states and 4761 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,938 INFO L93 Difference]: Finished difference Result 3320 states and 8844 transitions. [2021-06-05 17:53:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,948 INFO L225 Difference]: With dead ends: 3320 [2021-06-05 17:53:02,948 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 17:53:02,949 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 17:53:02,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2113. [2021-06-05 17:53:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7130681818181817) internal successors, (5730), 2112 states have internal predecessors, (5730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5730 transitions. [2021-06-05 17:53:02,991 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5730 transitions. Word has length 42 [2021-06-05 17:53:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,991 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5730 transitions. [2021-06-05 17:53:02,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5730 transitions. [2021-06-05 17:53:02,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:02,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,994 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:03,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 17:53:03,215 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:03,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:03,215 INFO L82 PathProgramCache]: Analyzing trace with hash -232957222, now seen corresponding path program 1 times [2021-06-05 17:53:03,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:03,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307036830] [2021-06-05 17:53:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,293 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 17:53:03,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:03,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307036830] [2021-06-05 17:53:03,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307036830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53122027] [2021-06-05 17:53:03,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:03,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:03,519 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 17:53:03,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53122027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:03,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:03,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377655029] [2021-06-05 17:53:03,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:03,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:03,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:03,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:03,521 INFO L87 Difference]: Start difference. First operand 2113 states and 5730 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 17:53:03,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:03,808 INFO L93 Difference]: Finished difference Result 4087 states and 10892 transitions. [2021-06-05 17:53:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:53:03,809 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 17:53:03,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:03,829 INFO L225 Difference]: With dead ends: 4087 [2021-06-05 17:53:03,829 INFO L226 Difference]: Without dead ends: 3529 [2021-06-05 17:53:03,829 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 279.0ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:53:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-06-05 17:53:03,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2150. [2021-06-05 17:53:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 2.7240577012563985) internal successors, (5854), 2149 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 5854 transitions. [2021-06-05 17:53:03,878 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 5854 transitions. Word has length 47 [2021-06-05 17:53:03,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:03,878 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 5854 transitions. [2021-06-05 17:53:03,879 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 17:53:03,879 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 5854 transitions. [2021-06-05 17:53:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:03,881 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:03,881 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:04,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:53:04,097 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:04,098 INFO L82 PathProgramCache]: Analyzing trace with hash -2095463568, now seen corresponding path program 2 times [2021-06-05 17:53:04,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:04,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68923977] [2021-06-05 17:53:04,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:04,167 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 17:53:04,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68923977] [2021-06-05 17:53:04,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68923977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225588054] [2021-06-05 17:53:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:04,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:04,361 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 17:53:04,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225588054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:04,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:04,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641727718] [2021-06-05 17:53:04,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:04,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:04,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:04,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:04,363 INFO L87 Difference]: Start difference. First operand 2150 states and 5854 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 17:53:04,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:04,532 INFO L93 Difference]: Finished difference Result 3549 states and 9211 transitions. [2021-06-05 17:53:04,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:04,532 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 17:53:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:04,538 INFO L225 Difference]: With dead ends: 3549 [2021-06-05 17:53:04,538 INFO L226 Difference]: Without dead ends: 3157 [2021-06-05 17:53:04,538 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:53:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-05 17:53:04,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2260. [2021-06-05 17:53:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 2.691013722886233) internal successors, (6079), 2259 states have internal predecessors, (6079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 6079 transitions. [2021-06-05 17:53:04,577 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 6079 transitions. Word has length 47 [2021-06-05 17:53:04,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:04,578 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 6079 transitions. [2021-06-05 17:53:04,578 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 17:53:04,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 6079 transitions. [2021-06-05 17:53:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:04,580 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:04,580 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:04,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 17:53:04,799 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:04,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:04,799 INFO L82 PathProgramCache]: Analyzing trace with hash -757470784, now seen corresponding path program 3 times [2021-06-05 17:53:04,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:04,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871821367] [2021-06-05 17:53:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:04,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:04,857 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 17:53:04,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871821367] [2021-06-05 17:53:04,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871821367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762715503] [2021-06-05 17:53:04,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:04,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:05,061 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 17:53:05,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762715503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:05,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:05,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297583260] [2021-06-05 17:53:05,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:05,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:05,087 INFO L87 Difference]: Start difference. First operand 2260 states and 6079 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 17:53:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:05,305 INFO L93 Difference]: Finished difference Result 4390 states and 11364 transitions. [2021-06-05 17:53:05,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 17:53:05,305 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 17:53:05,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:05,311 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 17:53:05,311 INFO L226 Difference]: Without dead ends: 3998 [2021-06-05 17:53:05,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:53:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2021-06-05 17:53:05,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 2423. [2021-06-05 17:53:05,353 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 17:53:05,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-06-05 17:53:05,358 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-06-05 17:53:05,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:05,358 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-06-05 17:53:05,358 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 17:53:05,358 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-06-05 17:53:05,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:05,361 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:05,361 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:05,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,577 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:05,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:05,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1589464196, now seen corresponding path program 4 times [2021-06-05 17:53:05,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:05,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760083536] [2021-06-05 17:53:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:05,631 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 17:53:05,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760083536] [2021-06-05 17:53:05,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760083536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338335730] [2021-06-05 17:53:05,632 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 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 17:53:05,700 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:05,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:05,835 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 17:53:05,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338335730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:05,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:05,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505698530] [2021-06-05 17:53:05,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:05,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:05,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:05,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:05,838 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 17:53:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:06,367 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-06-05 17:53:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 17:53:06,367 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 17:53:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:06,375 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 17:53:06,375 INFO L226 Difference]: Without dead ends: 4898 [2021-06-05 17:53:06,375 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 411.4ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:53:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-05 17:53:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-06-05 17:53:06,425 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 17:53:06,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-06-05 17:53:06,431 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-06-05 17:53:06,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:06,431 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-06-05 17:53:06,431 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 17:53:06,431 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-06-05 17:53:06,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:06,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:06,435 INFO L554 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 17:53:06,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,654 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:06,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:06,655 INFO L82 PathProgramCache]: Analyzing trace with hash 436541687, now seen corresponding path program 5 times [2021-06-05 17:53:06,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:06,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702036766] [2021-06-05 17:53:06,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:06,716 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 17:53:06,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:06,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702036766] [2021-06-05 17:53:06,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702036766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204503407] [2021-06-05 17:53:06,717 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 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 17:53:06,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:06,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:06,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:06,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:06,942 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 17:53:06,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204503407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:06,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:06,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440817786] [2021-06-05 17:53:06,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:06,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:06,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:06,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:06,943 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 17:53:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,185 INFO L93 Difference]: Finished difference Result 4436 states and 11435 transitions. [2021-06-05 17:53:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:53:07,186 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 17:53:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,192 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 17:53:07,193 INFO L226 Difference]: Without dead ends: 4044 [2021-06-05 17:53:07,193 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:53:07,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-06-05 17:53:07,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 2907. [2021-06-05 17:53:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 2906 states have (on average 2.6982105987611837) internal successors, (7841), 2906 states have internal predecessors, (7841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 7841 transitions. [2021-06-05 17:53:07,245 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 7841 transitions. Word has length 52 [2021-06-05 17:53:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:07,245 INFO L482 AbstractCegarLoop]: Abstraction has 2907 states and 7841 transitions. [2021-06-05 17:53:07,245 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 17:53:07,246 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 7841 transitions. [2021-06-05 17:53:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:07,249 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:07,249 INFO L554 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 17:53:07,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,467 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:07,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1774534471, now seen corresponding path program 6 times [2021-06-05 17:53:07,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:07,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305051548] [2021-06-05 17:53:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:07,528 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 17:53:07,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:07,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305051548] [2021-06-05 17:53:07,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305051548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415651823] [2021-06-05 17:53:07,529 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 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 17:53:07,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:53:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:07,771 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 17:53:07,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415651823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:07,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077715514] [2021-06-05 17:53:07,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:07,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:07,772 INFO L87 Difference]: Start difference. First operand 2907 states and 7841 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 17:53:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:08,136 INFO L93 Difference]: Finished difference Result 5429 states and 14100 transitions. [2021-06-05 17:53:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 17:53:08,137 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 17:53:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:08,145 INFO L225 Difference]: With dead ends: 5429 [2021-06-05 17:53:08,145 INFO L226 Difference]: Without dead ends: 4949 [2021-06-05 17:53:08,145 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:53:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4949 states. [2021-06-05 17:53:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4949 to 3201. [2021-06-05 17:53:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.7428125) internal successors, (8777), 3200 states have internal predecessors, (8777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 8777 transitions. [2021-06-05 17:53:08,213 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 8777 transitions. Word has length 52 [2021-06-05 17:53:08,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:08,213 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 8777 transitions. [2021-06-05 17:53:08,214 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 17:53:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 8777 transitions. [2021-06-05 17:53:08,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:08,218 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:08,218 INFO L554 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 17:53:08,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:53:08,437 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:08,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -173497845, now seen corresponding path program 7 times [2021-06-05 17:53:08,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:08,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55604329] [2021-06-05 17:53:08,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:08,498 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 17:53:08,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:08,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55604329] [2021-06-05 17:53:08,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55604329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630855602] [2021-06-05 17:53:08,499 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 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 17:53:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:08,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:08,711 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 17:53:08,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630855602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:08,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021096212] [2021-06-05 17:53:08,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:08,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:08,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:08,712 INFO L87 Difference]: Start difference. First operand 3201 states and 8777 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 17:53:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:09,398 INFO L93 Difference]: Finished difference Result 6437 states and 17140 transitions. [2021-06-05 17:53:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 17:53:09,398 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 17:53:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:09,406 INFO L225 Difference]: With dead ends: 6437 [2021-06-05 17:53:09,406 INFO L226 Difference]: Without dead ends: 5497 [2021-06-05 17:53:09,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 594.4ms TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 17:53:09,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2021-06-05 17:53:09,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 3228. [2021-06-05 17:53:09,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.7331887201735356) internal successors, (8820), 3227 states have internal predecessors, (8820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8820 transitions. [2021-06-05 17:53:09,467 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8820 transitions. Word has length 52 [2021-06-05 17:53:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:09,467 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8820 transitions. [2021-06-05 17:53:09,467 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 17:53:09,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8820 transitions. [2021-06-05 17:53:09,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:09,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:09,471 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:09,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:53:09,687 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:09,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:09,687 INFO L82 PathProgramCache]: Analyzing trace with hash 595336299, now seen corresponding path program 1 times [2021-06-05 17:53:09,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:09,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102951133] [2021-06-05 17:53:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:09,771 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 17:53:09,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:09,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102951133] [2021-06-05 17:53:09,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102951133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890417485] [2021-06-05 17:53:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 17:53:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:09,978 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 17:53:09,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890417485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:09,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:09,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57018902] [2021-06-05 17:53:09,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:09,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:09,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:09,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:09,980 INFO L87 Difference]: Start difference. First operand 3228 states and 8820 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 17:53:10,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:10,181 INFO L93 Difference]: Finished difference Result 4628 states and 12033 transitions. [2021-06-05 17:53:10,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:10,181 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 17:53:10,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:10,187 INFO L225 Difference]: With dead ends: 4628 [2021-06-05 17:53:10,187 INFO L226 Difference]: Without dead ends: 4476 [2021-06-05 17:53:10,187 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:53:10,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4476 states. [2021-06-05 17:53:10,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4476 to 3303. [2021-06-05 17:53:10,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.721078134463961) internal successors, (8985), 3302 states have internal predecessors, (8985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 8985 transitions. [2021-06-05 17:53:10,239 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 8985 transitions. Word has length 52 [2021-06-05 17:53:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:10,240 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 8985 transitions. [2021-06-05 17:53:10,240 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 17:53:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 8985 transitions. [2021-06-05 17:53:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:10,244 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:10,244 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:10,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:10,457 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:10,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1068664517, now seen corresponding path program 2 times [2021-06-05 17:53:10,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:10,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886212410] [2021-06-05 17:53:10,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:10,527 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 17:53:10,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:10,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886212410] [2021-06-05 17:53:10,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886212410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459729854] [2021-06-05 17:53:10,527 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 17:53:10,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:10,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:10,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:10,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:10,816 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 17:53:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459729854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:10,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:10,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018979986] [2021-06-05 17:53:10,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:10,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:10,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:10,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:10,818 INFO L87 Difference]: Start difference. First operand 3303 states and 8985 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 17:53:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:10,987 INFO L93 Difference]: Finished difference Result 4548 states and 11873 transitions. [2021-06-05 17:53:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:10,988 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 17:53:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:10,992 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 17:53:10,992 INFO L226 Difference]: Without dead ends: 4396 [2021-06-05 17:53:10,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 17:53:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4396 states. [2021-06-05 17:53:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4396 to 3302. [2021-06-05 17:53:11,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.7197818842774915) internal successors, (8978), 3301 states have internal predecessors, (8978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 8978 transitions. [2021-06-05 17:53:11,047 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 8978 transitions. Word has length 52 [2021-06-05 17:53:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:11,047 INFO L482 AbstractCegarLoop]: Abstraction has 3302 states and 8978 transitions. [2021-06-05 17:53:11,047 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 17:53:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 8978 transitions. [2021-06-05 17:53:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:11,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:11,055 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:11,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:11,269 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:11,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:11,269 INFO L82 PathProgramCache]: Analyzing trace with hash 515469461, now seen corresponding path program 3 times [2021-06-05 17:53:11,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:11,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726628026] [2021-06-05 17:53:11,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:11,328 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 17:53:11,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726628026] [2021-06-05 17:53:11,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726628026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40533921] [2021-06-05 17:53:11,328 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 17:53:11,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:53:11,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:11,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:11,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:11,556 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 17:53:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40533921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:11,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232436227] [2021-06-05 17:53:11,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:11,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:11,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:11,558 INFO L87 Difference]: Start difference. First operand 3302 states and 8978 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 17:53:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:11,892 INFO L93 Difference]: Finished difference Result 5758 states and 15224 transitions. [2021-06-05 17:53:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:53:11,892 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 17:53:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:11,898 INFO L225 Difference]: With dead ends: 5758 [2021-06-05 17:53:11,898 INFO L226 Difference]: Without dead ends: 5606 [2021-06-05 17:53:11,899 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 292.2ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:53:11,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2021-06-05 17:53:11,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 3560. [2021-06-05 17:53:11,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 2.766226468109019) internal successors, (9845), 3559 states have internal predecessors, (9845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 9845 transitions. [2021-06-05 17:53:11,957 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 9845 transitions. Word has length 52 [2021-06-05 17:53:11,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:11,958 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 9845 transitions. [2021-06-05 17:53:11,958 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 17:53:11,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 9845 transitions. [2021-06-05 17:53:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:11,963 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:11,963 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:12,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 17:53:12,180 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:12,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1432562855, now seen corresponding path program 4 times [2021-06-05 17:53:12,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:12,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93436199] [2021-06-05 17:53:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:12,238 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 17:53:12,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:12,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93436199] [2021-06-05 17:53:12,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93436199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570455453] [2021-06-05 17:53:12,239 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 17:53:12,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:12,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:12,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:12,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:12,459 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 17:53:12,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570455453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:12,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:12,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603374453] [2021-06-05 17:53:12,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:12,461 INFO L87 Difference]: Start difference. First operand 3560 states and 9845 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 17:53:12,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:12,969 INFO L93 Difference]: Finished difference Result 6909 states and 18691 transitions. [2021-06-05 17:53:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 17:53:12,970 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 17:53:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:12,977 INFO L225 Difference]: With dead ends: 6909 [2021-06-05 17:53:12,977 INFO L226 Difference]: Without dead ends: 6479 [2021-06-05 17:53:12,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 17:53:12,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2021-06-05 17:53:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 3764. [2021-06-05 17:53:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-06-05 17:53:13,037 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 52 [2021-06-05 17:53:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:13,037 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-06-05 17:53:13,037 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 17:53:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-06-05 17:53:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:13,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:13,041 INFO L554 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 17:53:13,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:53:13,260 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash -261717828, now seen corresponding path program 8 times [2021-06-05 17:53:13,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:13,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999948622] [2021-06-05 17:53:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:13,333 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 17:53:13,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999948622] [2021-06-05 17:53:13,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999948622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458244350] [2021-06-05 17:53:13,334 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 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 17:53:13,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:13,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:13,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:13,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:13,566 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 17:53:13,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458244350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:13,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338060856] [2021-06-05 17:53:13,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:13,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:13,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:13,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:13,568 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 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 17:53:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:13,811 INFO L93 Difference]: Finished difference Result 5089 states and 13488 transitions. [2021-06-05 17:53:13,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:13,812 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 17:53:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:13,817 INFO L225 Difference]: With dead ends: 5089 [2021-06-05 17:53:13,817 INFO L226 Difference]: Without dead ends: 4937 [2021-06-05 17:53:13,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:53:13,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-06-05 17:53:13,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 3764. [2021-06-05 17:53:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-06-05 17:53:13,880 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 57 [2021-06-05 17:53:13,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:13,880 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-06-05 17:53:13,881 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 17:53:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-06-05 17:53:13,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:13,885 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:13,885 INFO L554 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 17:53:14,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:53:14,103 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1024160518, now seen corresponding path program 9 times [2021-06-05 17:53:14,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:14,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286912605] [2021-06-05 17:53:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:14,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:14,189 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 17:53:14,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286912605] [2021-06-05 17:53:14,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286912605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679855637] [2021-06-05 17:53:14,190 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 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 17:53:14,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:53:14,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:14,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:53:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:14,738 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 17:53:14,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679855637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:14,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:14,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119005621] [2021-06-05 17:53:14,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:14,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:14,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:14,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:14,739 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 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 17:53:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:15,269 INFO L93 Difference]: Finished difference Result 6891 states and 18517 transitions. [2021-06-05 17:53:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 17:53:15,269 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 17:53:15,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:15,276 INFO L225 Difference]: With dead ends: 6891 [2021-06-05 17:53:15,276 INFO L226 Difference]: Without dead ends: 6333 [2021-06-05 17:53:15,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 641.5ms TimeCoverageRelationStatistics Valid=406, Invalid=1316, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 17:53:15,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2021-06-05 17:53:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 3764. [2021-06-05 17:53:15,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-06-05 17:53:15,356 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 57 [2021-06-05 17:53:15,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:15,356 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-06-05 17:53:15,356 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 17:53:15,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-06-05 17:53:15,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:15,359 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:15,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:15,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:15,576 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:15,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1774397998, now seen corresponding path program 5 times [2021-06-05 17:53:15,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:15,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786160470] [2021-06-05 17:53:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:15,658 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 17:53:15,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:15,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786160470] [2021-06-05 17:53:15,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786160470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830063131] [2021-06-05 17:53:15,659 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 17:53:15,724 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:15,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:15,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:15,898 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 17:53:15,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830063131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:15,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203872295] [2021-06-05 17:53:15,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:15,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:15,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:15,900 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 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 17:53:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:16,128 INFO L93 Difference]: Finished difference Result 5345 states and 14000 transitions. [2021-06-05 17:53:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 17:53:16,128 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 17:53:16,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:16,134 INFO L225 Difference]: With dead ends: 5345 [2021-06-05 17:53:16,136 INFO L226 Difference]: Without dead ends: 5193 [2021-06-05 17:53:16,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 229.0ms TimeCoverageRelationStatistics Valid=228, Invalid=642, Unknown=0, NotChecked=0, Total=870 [2021-06-05 17:53:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5193 states. [2021-06-05 17:53:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5193 to 3764. [2021-06-05 17:53:16,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-06-05 17:53:16,187 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 57 [2021-06-05 17:53:16,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:16,188 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-06-05 17:53:16,188 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 17:53:16,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-06-05 17:53:16,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:16,192 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:16,192 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:16,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 17:53:16,394 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:16,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:16,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1037309370, now seen corresponding path program 6 times [2021-06-05 17:53:16,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:16,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624492206] [2021-06-05 17:53:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:16,460 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 17:53:16,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:16,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624492206] [2021-06-05 17:53:16,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624492206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:16,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775872147] [2021-06-05 17:53:16,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:16,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:53:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:16,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:16,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown