/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label49.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:11,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:11,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:11,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:11,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:11,499 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:11,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:11,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:11,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:11,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:11,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:11,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:11,514 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:11,517 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:11,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:11,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:11,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:11,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:11,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:11,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:11,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:11,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:11,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:11,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:11,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:11,558 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:11,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:11,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:11,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:11,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:11,563 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:11,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:11,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:11,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:11,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:11,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:11,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:11,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:11,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:11,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:11,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:11,577 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 [2020-09-24 21:40:11,621 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:11,621 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:11,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:11,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:11,624 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:11,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:11,625 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:11,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:11,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:11,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:11,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:11,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:11,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:11,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:11,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:11,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:11,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:11,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:11,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:11,628 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:11,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:11,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:11,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:11,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:11,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:11,630 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:11,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:11,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:11,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:11,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:40:12,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:12,088 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:12,092 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:12,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:12,094 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:12,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label49.c [2020-09-24 21:40:12,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce2ae2f47/ba95bd0ccbca44188345d40a4f26e557/FLAGebbc7faa1 [2020-09-24 21:40:12,847 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:12,848 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label49.c [2020-09-24 21:40:12,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce2ae2f47/ba95bd0ccbca44188345d40a4f26e557/FLAGebbc7faa1 [2020-09-24 21:40:13,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ce2ae2f47/ba95bd0ccbca44188345d40a4f26e557 [2020-09-24 21:40:13,120 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:13,126 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:13,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:13,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:13,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:13,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:13" (1/1) ... [2020-09-24 21:40:13,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27dd7b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:13, skipping insertion in model container [2020-09-24 21:40:13,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:13" (1/1) ... [2020-09-24 21:40:13,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:13,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:13,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:13,803 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:14,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:14,063 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:14,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14 WrapperNode [2020-09-24 21:40:14,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:14,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:14,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:14,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:14,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (1/1) ... [2020-09-24 21:40:14,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:14,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:14,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:14,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:14,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (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 [2020-09-24 21:40:14,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:14,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:14,278 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:14,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:15,561 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:15,561 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:15,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:15 BoogieIcfgContainer [2020-09-24 21:40:15,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:15,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:15,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:15,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:15,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:13" (1/3) ... [2020-09-24 21:40:15,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b36f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:15, skipping insertion in model container [2020-09-24 21:40:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:14" (2/3) ... [2020-09-24 21:40:15,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b36f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:15, skipping insertion in model container [2020-09-24 21:40:15,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:15" (3/3) ... [2020-09-24 21:40:15,581 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label49.c [2020-09-24 21:40:15,592 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:15,604 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:15,627 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:15,669 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:15,669 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:15,669 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:15,670 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:15,670 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:15,670 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:15,670 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:15,670 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:15,703 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:15,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-09-24 21:40:15,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:15,726 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:40:15,726 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:15,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:15,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2140935381, now seen corresponding path program 1 times [2020-09-24 21:40:15,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:15,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548802095] [2020-09-24 21:40:15,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:16,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:17,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:19,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:21,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-09-24 21:40:21,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:40:21,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:40:21,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:21,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:21,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:21,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:21,546 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2020-09-24 21:40:21,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:21,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:21,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:21,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:21,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:21,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-24 21:40:21,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:21,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:21,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:21,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:22,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:22,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548802095] [2020-09-24 21:40:22,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:22,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:22,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136984926] [2020-09-24 21:40:22,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:22,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:22,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:22,373 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:23,013 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-09-24 21:40:23,277 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-09-24 21:40:23,547 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-09-24 21:40:24,058 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-09-24 21:40:25,058 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-09-24 21:40:25,501 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-09-24 21:40:27,357 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 21:40:30,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:30,185 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:40:30,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 135 [2020-09-24 21:40:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:30,220 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:30,221 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:30,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:40:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:30,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1150 transitions. [2020-09-24 21:40:30,376 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1150 transitions. Word has length 135 [2020-09-24 21:40:30,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:30,379 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1150 transitions. [2020-09-24 21:40:30,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1150 transitions. [2020-09-24 21:40:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 21:40:30,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:30,395 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:30,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:30,398 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:30,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:30,399 INFO L82 PathProgramCache]: Analyzing trace with hash 582615064, now seen corresponding path program 1 times [2020-09-24 21:40:30,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:30,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949894486] [2020-09-24 21:40:30,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:30,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:30,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:31,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:31,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:33,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-09-24 21:40:35,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-24 21:40:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-09-24 21:40:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:40:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:35,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:40:35,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:36,314 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-09-24 21:40:36,494 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2020-09-24 21:40:36,643 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-09-24 21:40:36,825 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 35 [2020-09-24 21:40:36,990 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2020-09-24 21:40:37,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:37,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:37,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:37,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:37,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-24 21:40:37,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:37,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:37,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:37,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:40:37,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:37,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 21:40:37,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:40:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:37,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:40:37,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:37,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949894486] [2020-09-24 21:40:37,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:37,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:40:37,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055743483] [2020-09-24 21:40:37,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:40:37,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:40:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:40:37,760 INFO L87 Difference]: Start difference. First operand 985 states and 1150 transitions. Second operand 21 states. [2020-09-24 21:40:38,452 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-09-24 21:40:38,614 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-09-24 21:40:39,445 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 91 [2020-09-24 21:40:41,204 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 90 [2020-09-24 21:40:41,595 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-09-24 21:40:42,074 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-09-24 21:40:42,466 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-24 21:40:42,896 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-09-24 21:40:43,226 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-09-24 21:40:45,146 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-09-24 21:40:45,630 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-09-24 21:40:46,038 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80 [2020-09-24 21:40:46,272 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-09-24 21:40:46,522 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-09-24 21:40:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:47,925 INFO L93 Difference]: Finished difference Result 2272 states and 2667 transitions. [2020-09-24 21:40:47,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:40:47,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-09-24 21:40:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:47,944 INFO L225 Difference]: With dead ends: 2272 [2020-09-24 21:40:47,944 INFO L226 Difference]: Without dead ends: 1375 [2020-09-24 21:40:47,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=717, Invalid=1833, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:40:47,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-09-24 21:40:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1226. [2020-09-24 21:40:48,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-09-24 21:40:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1425 transitions. [2020-09-24 21:40:48,036 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1425 transitions. Word has length 152 [2020-09-24 21:40:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:48,037 INFO L479 AbstractCegarLoop]: Abstraction has 1226 states and 1425 transitions. [2020-09-24 21:40:48,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:40:48,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1425 transitions. [2020-09-24 21:40:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:40:48,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:48,043 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-24 21:40:48,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:40:48,045 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:48,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1996643290, now seen corresponding path program 1 times [2020-09-24 21:40:48,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:48,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627617813] [2020-09-24 21:40:48,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:48,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:49,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:50,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:52,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 21:40:53,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-24 21:40:53,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:40:53,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:40:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:53,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:40:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:53,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:53,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:53,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-09-24 21:40:53,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:40:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:40:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:40:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:53,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:53,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:53,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:40:53,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:40:53,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-24 21:40:53,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:53,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:40:53,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:40:53,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:40:53,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:40:54,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627617813] [2020-09-24 21:40:54,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:40:54,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:40:54,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118623321] [2020-09-24 21:40:54,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:40:54,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:40:54,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:40:54,290 INFO L87 Difference]: Start difference. First operand 1226 states and 1425 transitions. Second operand 13 states. [2020-09-24 21:40:55,420 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 73 [2020-09-24 21:40:55,836 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-09-24 21:40:56,563 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-09-24 21:40:56,774 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-09-24 21:40:57,029 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 71 [2020-09-24 21:40:58,850 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-09-24 21:41:02,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:02,645 INFO L93 Difference]: Finished difference Result 3278 states and 4009 transitions. [2020-09-24 21:41:02,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 21:41:02,645 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 156 [2020-09-24 21:41:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:02,658 INFO L225 Difference]: With dead ends: 3278 [2020-09-24 21:41:02,658 INFO L226 Difference]: Without dead ends: 1880 [2020-09-24 21:41:02,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=397, Invalid=1009, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 21:41:02,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2020-09-24 21:41:02,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1527. [2020-09-24 21:41:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1527 states. [2020-09-24 21:41:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 1767 transitions. [2020-09-24 21:41:02,725 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 1767 transitions. Word has length 156 [2020-09-24 21:41:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:02,726 INFO L479 AbstractCegarLoop]: Abstraction has 1527 states and 1767 transitions. [2020-09-24 21:41:02,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:41:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 1767 transitions. [2020-09-24 21:41:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-09-24 21:41:02,733 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:02,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2020-09-24 21:41:02,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:02,734 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:02,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:02,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1629784927, now seen corresponding path program 1 times [2020-09-24 21:41:02,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:02,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920954388] [2020-09-24 21:41:02,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:02,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:03,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking...