/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/eca-rers2012/Problem19_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:10:37,228 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:10:37,232 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:10:37,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:10:37,279 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:10:37,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:10:37,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:10:37,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:10:37,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:10:37,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:10:37,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:10:37,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:10:37,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:10:37,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:10:37,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:10:37,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:10:37,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:10:37,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:10:37,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:10:37,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:10:37,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:10:37,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:10:37,346 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:10:37,349 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:10:37,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:10:37,359 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:10:37,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:10:37,368 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:10:37,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:10:37,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:10:37,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:10:37,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:10:37,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:10:37,378 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:10:37,381 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:10:37,381 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:10:37,382 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:10:37,382 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:10:37,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:10:37,384 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:10:37,385 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:10:37,387 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 [2020-10-28 14:10:37,459 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:10:37,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:10:37,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:10:37,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:10:37,466 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:10:37,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:10:37,468 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:10:37,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:10:37,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:10:37,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:10:37,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:10:37,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:10:37,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:10:37,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:10:37,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:10:37,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:10:37,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:10:37,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:10:37,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:10:37,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:10:37,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:10:37,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:10:37,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:10:37,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:10:37,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:10:37,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:10:37,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:10:37,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:10:37,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:10:37,475 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:10:38,041 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:10:38,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:10:38,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:10:38,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:10:38,117 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:10:38,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label31.c [2020-10-28 14:10:38,218 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25547ba00/4b210ddd06664cb7a6b7389f95caf236/FLAG5b4cddc2e [2020-10-28 14:10:39,630 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:10:39,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label31.c [2020-10-28 14:10:39,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25547ba00/4b210ddd06664cb7a6b7389f95caf236/FLAG5b4cddc2e [2020-10-28 14:10:39,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/25547ba00/4b210ddd06664cb7a6b7389f95caf236 [2020-10-28 14:10:39,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:10:39,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:10:39,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:10:39,800 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:10:39,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:10:39,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:10:39" (1/1) ... [2020-10-28 14:10:39,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2ecc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:39, skipping insertion in model container [2020-10-28 14:10:39,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:10:39" (1/1) ... [2020-10-28 14:10:39,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:10:40,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:10:42,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:10:42,748 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:10:44,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:10:44,077 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:10:44,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44 WrapperNode [2020-10-28 14:10:44,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:10:44,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:10:44,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:10:44,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:10:44,102 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,613 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (1/1) ... [2020-10-28 14:10:44,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:10:44,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:10:44,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:10:44,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:10:44,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (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 14:10:45,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:10:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:10:45,033 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:10:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:10:45,034 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:10:45,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:10:45,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:10:45,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:10:45,036 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:10:45,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:10:45,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:10:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:10:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:10:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:10:45,038 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:10:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:10:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:10:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:10:45,040 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:10:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:10:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:10:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:10:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:10:45,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:10:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:10:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:10:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:10:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:10:45,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:11:02,994 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:11:02,995 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:11:03,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:11:03 BoogieIcfgContainer [2020-10-28 14:11:03,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:11:03,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:11:03,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:11:03,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:11:03,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:10:39" (1/3) ... [2020-10-28 14:11:03,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c99d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:11:03, skipping insertion in model container [2020-10-28 14:11:03,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:10:44" (2/3) ... [2020-10-28 14:11:03,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7c99d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:11:03, skipping insertion in model container [2020-10-28 14:11:03,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:11:03" (3/3) ... [2020-10-28 14:11:03,015 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label31.c [2020-10-28 14:11:03,030 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:11:03,054 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:11:03,071 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:11:03,116 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:11:03,117 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:11:03,117 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:11:03,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:11:03,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:11:03,117 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:11:03,118 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:11:03,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:11:03,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:11:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:11:03,183 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:03,184 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] [2020-10-28 14:11:03,185 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:03,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:03,193 INFO L82 PathProgramCache]: Analyzing trace with hash 177362654, now seen corresponding path program 1 times [2020-10-28 14:11:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:03,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583237307] [2020-10-28 14:11:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:03,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:04,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:04,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:11:04,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:04,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 787 [2020-10-28 14:11:04,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:04,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:11:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:11:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:11:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 14:11:04,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:04,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:04,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:04,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:04,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:04,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 14:11:04,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:04,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:04,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:04,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:04,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:04,723 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 14:11:04,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583237307] [2020-10-28 14:11:04,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:11:04,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:11:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815526381] [2020-10-28 14:11:04,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:11:04,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:11:04,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:11:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:11:04,771 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:11:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:11:41,374 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-28 14:11:41,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:11:41,379 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:11:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:11:41,432 INFO L225 Difference]: With dead ends: 5116 [2020-10-28 14:11:41,433 INFO L226 Difference]: Without dead ends: 3271 [2020-10-28 14:11:41,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:11:41,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-28 14:11:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-28 14:11:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-28 14:11:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-28 14:11:41,709 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 25 [2020-10-28 14:11:41,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:11:41,710 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-28 14:11:41,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:11:41,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-28 14:11:41,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 14:11:41,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:41,723 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:11:41,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:11:41,724 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:41,725 INFO L82 PathProgramCache]: Analyzing trace with hash -48407943, now seen corresponding path program 1 times [2020-10-28 14:11:41,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:41,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243873463] [2020-10-28 14:11:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:41,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:43,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:43,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 14:11:43,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:11:43,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-10-28 14:11:43,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:43,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:11:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:11:43,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:11:43,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:11:43,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:43,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:43,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:43,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:43,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:43,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:43,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 14:11:43,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:43,847 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:43,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:43,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:43,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:43,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:43,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:11:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:44,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:44,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:11:44,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:44,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 181 [2020-10-28 14:11:44,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:44,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:11:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:11:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:11:44,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:11:44,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243873463] [2020-10-28 14:11:44,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:11:44,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:11:44,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583323404] [2020-10-28 14:11:44,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:11:44,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:11:44,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:11:44,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:11:44,205 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-28 14:12:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:12:31,318 INFO L93 Difference]: Finished difference Result 9523 states and 16481 transitions. [2020-10-28 14:12:31,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:12:31,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 97 [2020-10-28 14:12:31,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:12:31,363 INFO L225 Difference]: With dead ends: 9523 [2020-10-28 14:12:31,363 INFO L226 Difference]: Without dead ends: 6329 [2020-10-28 14:12:31,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:12:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2020-10-28 14:12:31,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6215. [2020-10-28 14:12:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6215 states. [2020-10-28 14:12:31,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 10300 transitions. [2020-10-28 14:12:31,576 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 10300 transitions. Word has length 97 [2020-10-28 14:12:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:12:31,576 INFO L481 AbstractCegarLoop]: Abstraction has 6215 states and 10300 transitions. [2020-10-28 14:12:31,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:12:31,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 10300 transitions. [2020-10-28 14:12:31,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-28 14:12:31,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:31,579 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:12:31,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:12:31,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:31,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:31,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1444558682, now seen corresponding path program 1 times [2020-10-28 14:12:31,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:31,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004356515] [2020-10-28 14:12:31,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:31,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:31,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:32,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:32,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:32,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 14:12:32,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:12:32,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 968 [2020-10-28 14:12:32,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:32,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:32,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:32,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:32,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:12:32,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:32,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:32,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:32,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:32,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:32,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 14:12:32,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:32,741 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:32,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:32,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:12:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:32,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:32,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:32,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-28 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:32,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:12:32,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:12:32,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:12:32,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:12:33,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:33,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004356515] [2020-10-28 14:12:33,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:33,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:12:33,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795332368] [2020-10-28 14:12:33,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:12:33,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:12:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:12:33,044 INFO L87 Difference]: Start difference. First operand 6215 states and 10300 transitions. Second operand 7 states. [2020-10-28 14:13:26,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:26,624 INFO L93 Difference]: Finished difference Result 15605 states and 25772 transitions. [2020-10-28 14:13:26,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:13:26,629 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 100 [2020-10-28 14:13:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:26,691 INFO L225 Difference]: With dead ends: 15605 [2020-10-28 14:13:26,691 INFO L226 Difference]: Without dead ends: 9396 [2020-10-28 14:13:26,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:13:26,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9396 states. [2020-10-28 14:13:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9396 to 9132. [2020-10-28 14:13:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9132 states. [2020-10-28 14:13:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9132 states to 9132 states and 13503 transitions. [2020-10-28 14:13:27,030 INFO L78 Accepts]: Start accepts. Automaton has 9132 states and 13503 transitions. Word has length 100 [2020-10-28 14:13:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:27,031 INFO L481 AbstractCegarLoop]: Abstraction has 9132 states and 13503 transitions. [2020-10-28 14:13:27,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:13:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 9132 states and 13503 transitions. [2020-10-28 14:13:27,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 14:13:27,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:27,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:27,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:13:27,037 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:27,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:27,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1654909974, now seen corresponding path program 1 times [2020-10-28 14:13:27,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:27,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370040320] [2020-10-28 14:13:27,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:27,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:27,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:29,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:29,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-28 14:13:29,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:13:29,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2198 [2020-10-28 14:13:29,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:29,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:13:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:29,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-28 14:13:29,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:29,646 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:13:29,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:29,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:29,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:29,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:29,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:29,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:13:29,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:29,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:29,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:29,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:13:29,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:13:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:30,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:30,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-28 14:13:30,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:30,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-28 14:13:30,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:30,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:30,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:13:30,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:13:30,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 14:13:30,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:13:30,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370040320] [2020-10-28 14:13:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:13:30,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:13:30,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732017167] [2020-10-28 14:13:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:13:30,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:13:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:13:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:13:30,731 INFO L87 Difference]: Start difference. First operand 9132 states and 13503 transitions. Second operand 8 states. [2020-10-28 14:13:30,897 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:13:36,572 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66