/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 23:59:53,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 23:59:53,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 23:59:53,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 23:59:53,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 23:59:53,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 23:59:54,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 23:59:54,006 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 23:59:54,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 23:59:54,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 23:59:54,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 23:59:54,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 23:59:54,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 23:59:54,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 23:59:54,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 23:59:54,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 23:59:54,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 23:59:54,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 23:59:54,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 23:59:54,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 23:59:54,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 23:59:54,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 23:59:54,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 23:59:54,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 23:59:54,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 23:59:54,050 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 23:59:54,050 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 23:59:54,051 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 23:59:54,052 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 23:59:54,053 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 23:59:54,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 23:59:54,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 23:59:54,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 23:59:54,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 23:59:54,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 23:59:54,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 23:59:54,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 23:59:54,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 23:59:54,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 23:59:54,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 23:59:54,061 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 23:59:54,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 23:59:54,089 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 23:59:54,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 23:59:54,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 23:59:54,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 23:59:54,092 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 23:59:54,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 23:59:54,092 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 23:59:54,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 23:59:54,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 23:59:54,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 23:59:54,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 23:59:54,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 23:59:54,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 23:59:54,094 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 23:59:54,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 23:59:54,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 23:59:54,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 23:59:54,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 23:59:54,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 23:59:54,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 23:59:54,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 23:59:54,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 23:59:54,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 23:59:54,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 23:59:54,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 23:59:54,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 23:59:54,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 23:59:54,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 23:59:54,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 23:59:54,098 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 23:59:54,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 23:59:54,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 23:59:54,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 23:59:54,496 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 23:59:54,497 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 23:59:54,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 23:59:54,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/059a1b995/e425cc3a1006407aaae3fb315765f7f5/FLAG83f890d2f [2020-10-27 23:59:55,679 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 23:59:55,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-27 23:59:55,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/059a1b995/e425cc3a1006407aaae3fb315765f7f5/FLAG83f890d2f [2020-10-27 23:59:56,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/059a1b995/e425cc3a1006407aaae3fb315765f7f5 [2020-10-27 23:59:56,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 23:59:56,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 23:59:56,056 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 23:59:56,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 23:59:56,061 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 23:59:56,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:59:56" (1/1) ... [2020-10-27 23:59:56,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d64439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 11:59:56, skipping insertion in model container [2020-10-27 23:59:56,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 11:59:56" (1/1) ... [2020-10-27 23:59:56,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 23:59:56,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 23:59:58,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 23:59:58,701 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:00:00,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:00:00,060 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:00:00,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00 WrapperNode [2020-10-28 00:00:00,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:00:00,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:00:00,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:00:00,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:00:00,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,400 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... [2020-10-28 00:00:00,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:00:00,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:00:00,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:00:00,511 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:00:00,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-28 00:00:00,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:00:00,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:00:00,604 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:00:00,604 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:00:00,605 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:00:00,605 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:00:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:00:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:00:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:00:00,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:00:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:00:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:00:00,607 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:00:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:00:00,608 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:00:00,609 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:00:00,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:00:00,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:00:00,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:00:00,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:00:07,972 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:00:07,973 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:00:07,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:07 BoogieIcfgContainer [2020-10-28 00:00:07,977 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:00:07,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:00:07,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:00:07,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:00:07,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 11:59:56" (1/3) ... [2020-10-28 00:00:07,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d3b615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:07, skipping insertion in model container [2020-10-28 00:00:07,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:00:00" (2/3) ... [2020-10-28 00:00:07,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d3b615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:00:07, skipping insertion in model container [2020-10-28 00:00:07,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:00:07" (3/3) ... [2020-10-28 00:00:07,987 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c.v+lhb-reducer.c [2020-10-28 00:00:07,999 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:00:08,006 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:00:08,020 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:00:08,058 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:00:08,058 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:00:08,058 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:00:08,058 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:00:08,058 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:00:08,059 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:00:08,059 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:00:08,059 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:00:08,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2091 states. [2020-10-28 00:00:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 00:00:08,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:00:08,166 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:00:08,167 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:00:08,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:00:08,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1948812266, now seen corresponding path program 1 times [2020-10-28 00:00:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:00:08,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764035924] [2020-10-28 00:00:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:00:08,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:09,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:09,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:10,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:10,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:10,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:11,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:12,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:13,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:13,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:13,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 00:00:13,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:00:13,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 00:00:13,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:13,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:00:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 00:00:13,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:00:13,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:00:18,322 WARN L193 SmtUtils]: Spent 3.92 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-28 00:00:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:00:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:00:18,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:00:18,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:00:18,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:00:18,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:00:18,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 00:00:18,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:00:18,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:00:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:00:18,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:00:18,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:00:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:00:18,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764035924] [2020-10-28 00:00:18,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:00:18,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:00:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500951709] [2020-10-28 00:00:18,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:00:18,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:00:18,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:00:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:00:18,590 INFO L87 Difference]: Start difference. First operand 2091 states. Second operand 7 states. [2020-10-28 00:00:22,788 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:01:02,667 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:01:07,668 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-28 00:01:12,944 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 800 [2020-10-28 00:01:17,029 WARN L193 SmtUtils]: Spent 3.82 s on a formula simplification that was a NOOP. DAG size: 801 [2020-10-28 00:01:23,350 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 802 [2020-10-28 00:01:27,278 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:01:31,709 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 804 [2020-10-28 00:01:31,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:01:31,835 INFO L93 Difference]: Finished difference Result 5921 states and 10299 transitions. [2020-10-28 00:01:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:01:31,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2020-10-28 00:01:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:01:31,913 INFO L225 Difference]: With dead ends: 5921 [2020-10-28 00:01:31,913 INFO L226 Difference]: Without dead ends: 4641 [2020-10-28 00:01:31,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:01:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2020-10-28 00:01:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 3329. [2020-10-28 00:01:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3329 states. [2020-10-28 00:01:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3329 states to 3329 states and 4598 transitions. [2020-10-28 00:01:32,183 INFO L78 Accepts]: Start accepts. Automaton has 3329 states and 4598 transitions. Word has length 106 [2020-10-28 00:01:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:01:32,184 INFO L481 AbstractCegarLoop]: Abstraction has 3329 states and 4598 transitions. [2020-10-28 00:01:32,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:01:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3329 states and 4598 transitions. [2020-10-28 00:01:32,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-28 00:01:32,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:01:32,197 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:01:32,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:01:32,198 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:01:32,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:01:32,199 INFO L82 PathProgramCache]: Analyzing trace with hash 463471485, now seen corresponding path program 1 times [2020-10-28 00:01:32,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:01:32,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042811598] [2020-10-28 00:01:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:01:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:32,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:33,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:34,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:34,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:35,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:37,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:37,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 00:01:37,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:01:37,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 00:01:37,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:37,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:01:37,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 00:01:37,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:01:37,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:01:41,400 WARN L193 SmtUtils]: Spent 3.86 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-28 00:01:41,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:01:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:01:41,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:01:41,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:01:41,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:01:41,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:01:41,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 00:01:41,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:01:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:01:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:01:41,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:01:41,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:01:41,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:01:41,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042811598] [2020-10-28 00:01:41,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:01:41,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:01:41,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542147319] [2020-10-28 00:01:41,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:01:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:01:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:01:41,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:01:41,606 INFO L87 Difference]: Start difference. First operand 3329 states and 4598 transitions. Second operand 7 states. [2020-10-28 00:01:45,903 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:02:07,554 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-28 00:02:12,385 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:02:17,349 WARN L193 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 800 [2020-10-28 00:02:21,471 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 801 [2020-10-28 00:02:26,975 WARN L193 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:02:31,027 WARN L193 SmtUtils]: Spent 3.98 s on a formula simplification that was a NOOP. DAG size: 802 [2020-10-28 00:02:35,529 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 804 [2020-10-28 00:02:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:02:35,665 INFO L93 Difference]: Finished difference Result 11952 states and 17003 transitions. [2020-10-28 00:02:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:02:35,669 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 107 [2020-10-28 00:02:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:02:35,717 INFO L225 Difference]: With dead ends: 11952 [2020-10-28 00:02:35,718 INFO L226 Difference]: Without dead ends: 9350 [2020-10-28 00:02:35,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:02:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9350 states. [2020-10-28 00:02:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9350 to 6796. [2020-10-28 00:02:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6796 states. [2020-10-28 00:02:36,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 9641 transitions. [2020-10-28 00:02:36,094 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 9641 transitions. Word has length 107 [2020-10-28 00:02:36,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:02:36,095 INFO L481 AbstractCegarLoop]: Abstraction has 6796 states and 9641 transitions. [2020-10-28 00:02:36,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:02:36,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 9641 transitions. [2020-10-28 00:02:36,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:02:36,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:02:36,113 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:02:36,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:02:36,113 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:02:36,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:02:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash -195731726, now seen corresponding path program 1 times [2020-10-28 00:02:36,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:02:36,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928318973] [2020-10-28 00:02:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:02:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:36,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:36,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:36,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:36,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:36,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:37,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:38,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:39,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:41,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:41,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 00:02:41,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:02:41,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:02:41,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:02:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:02:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:02:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:45,259 WARN L193 SmtUtils]: Spent 3.84 s on a formula simplification that was a NOOP. DAG size: 799 [2020-10-28 00:02:45,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:02:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:02:45,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:02:45,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:02:45,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:02:45,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:02:45,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 00:02:45,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:02:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:02:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:02:45,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:02:45,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:02:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:02:45,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928318973] [2020-10-28 00:02:45,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:02:45,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:02:45,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817250652] [2020-10-28 00:02:45,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:02:45,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:02:45,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:02:45,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:02:45,403 INFO L87 Difference]: Start difference. First operand 6796 states and 9641 transitions. Second operand 7 states. [2020-10-28 00:02:49,613 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:03:09,407 WARN L193 SmtUtils]: Spent 4.20 s on a formula simplification that was a NOOP. DAG size: 805 [2020-10-28 00:03:14,116 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:03:18,738 WARN L193 SmtUtils]: Spent 4.00 s on a formula simplification that was a NOOP. DAG size: 800 [2020-10-28 00:03:22,836 WARN L193 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 801 [2020-10-28 00:03:28,460 WARN L193 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 803 [2020-10-28 00:03:32,526 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification that was a NOOP. DAG size: 802 [2020-10-28 00:03:37,025 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification that was a NOOP. DAG size: 804 [2020-10-28 00:03:37,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:03:37,153 INFO L93 Difference]: Finished difference Result 14926 states and 21363 transitions. [2020-10-28 00:03:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 00:03:37,159 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 108 [2020-10-28 00:03:37,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:03:37,212 INFO L225 Difference]: With dead ends: 14926 [2020-10-28 00:03:37,212 INFO L226 Difference]: Without dead ends: 12673 [2020-10-28 00:03:37,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2020-10-28 00:03:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12673 states. [2020-10-28 00:03:37,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12673 to 8367. [2020-10-28 00:03:37,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8367 states. [2020-10-28 00:03:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8367 states to 8367 states and 11996 transitions. [2020-10-28 00:03:37,693 INFO L78 Accepts]: Start accepts. Automaton has 8367 states and 11996 transitions. Word has length 108 [2020-10-28 00:03:37,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:03:37,694 INFO L481 AbstractCegarLoop]: Abstraction has 8367 states and 11996 transitions. [2020-10-28 00:03:37,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:03:37,694 INFO L276 IsEmpty]: Start isEmpty. Operand 8367 states and 11996 transitions. [2020-10-28 00:03:37,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-28 00:03:37,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:03:37,713 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:03:37,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:03:37,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:03:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:03:37,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1846496908, now seen corresponding path program 1 times [2020-10-28 00:03:37,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:03:37,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762840703] [2020-10-28 00:03:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:03:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:03:37,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:38,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:39,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:03:40,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking...