/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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:40:37,510 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:40:37,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:40:37,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:40:37,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:40:37,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:40:37,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:40:37,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:40:37,547 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:40:37,548 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:40:37,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:40:37,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:40:37,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:40:37,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:40:37,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:40:37,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:40:37,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:40:37,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:40:37,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:40:37,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:40:37,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:40:37,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:40:37,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:40:37,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:40:37,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:40:37,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:40:37,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:40:37,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:40:37,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:40:37,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:40:37,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:40:37,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:40:37,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:40:37,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:40:37,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:40:37,573 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:40:37,574 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:40:37,574 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:40:37,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:40:37,576 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:40:37,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:40:37,578 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 21:40:37,632 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:40:37,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:40:37,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:40:37,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:40:37,635 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:40:37,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:40:37,635 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:40:37,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:40:37,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:40:37,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:40:37,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:40:37,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:40:37,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:40:37,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:40:37,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:40:37,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:40:37,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:40:37,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:40:37,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:40:37,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:40:37,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:40:37,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:40:37,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:40:37,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:40:37,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:40:37,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:40:37,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:40:37,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:40:37,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:40:37,642 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 21:40:38,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:40:38,185 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:40:38,191 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:40:38,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:40:38,194 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:40:38,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2020-09-24 21:40:38,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32b2afa39/139fad41c33e4b9e9f55377f0e03a91d/FLAG5b01670bd [2020-09-24 21:40:38,977 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:40:38,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label55.c [2020-09-24 21:40:39,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32b2afa39/139fad41c33e4b9e9f55377f0e03a91d/FLAG5b01670bd [2020-09-24 21:40:39,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/32b2afa39/139fad41c33e4b9e9f55377f0e03a91d [2020-09-24 21:40:39,189 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:40:39,193 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:40:39,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:39,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:40:39,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:40:39,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:39" (1/1) ... [2020-09-24 21:40:39,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@194bd3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:39, skipping insertion in model container [2020-09-24 21:40:39,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:40:39" (1/1) ... [2020-09-24 21:40:39,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:40:39,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:40:39,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:39,776 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:40:39,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:40:40,004 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:40:40,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40 WrapperNode [2020-09-24 21:40:40,005 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:40:40,006 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:40:40,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:40:40,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:40:40,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,131 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (1/1) ... [2020-09-24 21:40:40,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:40:40,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:40:40,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:40:40,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:40:40,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (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 21:40:40,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:40:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:40:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 21:40:40,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:40:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 21:40:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:40:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:40:40,263 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 21:40:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:40:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:40:40,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:40:41,584 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:40:41,585 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:40:41,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:41 BoogieIcfgContainer [2020-09-24 21:40:41,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:40:41,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:40:41,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:40:41,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:40:41,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:40:39" (1/3) ... [2020-09-24 21:40:41,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ec6d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:41, skipping insertion in model container [2020-09-24 21:40:41,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:40:40" (2/3) ... [2020-09-24 21:40:41,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ec6d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:40:41, skipping insertion in model container [2020-09-24 21:40:41,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:40:41" (3/3) ... [2020-09-24 21:40:41,611 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label55.c [2020-09-24 21:40:41,623 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:40:41,640 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:40:41,663 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:40:41,708 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:40:41,708 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:40:41,708 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:40:41,708 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:40:41,709 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:40:41,709 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:40:41,709 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:40:41,709 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:40:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states. [2020-09-24 21:40:41,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 21:40:41,770 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:41,772 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, 1, 1, 1, 1] [2020-09-24 21:40:41,773 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:41,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:41,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2144769179, now seen corresponding path program 1 times [2020-09-24 21:40:41,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:41,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523682103] [2020-09-24 21:40:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:42,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:46,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:47,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:47,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 21:40:47,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 21:40:47,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-09-24 21:40:47,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:47,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:40:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:40:47,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-09-24 21:40:47,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:40:47,703 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-09-24 21:40:47,823 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-09-24 21:40:48,032 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 38 [2020-09-24 21:40:48,218 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 38 [2020-09-24 21:40:48,416 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-09-24 21:40:48,563 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 36 [2020-09-24 21:40:48,711 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 32 [2020-09-24 21:40:48,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:40:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:40:48,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:40:48,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:40:48,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:40:48,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:40:48,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 21:40:48,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:40:48,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:40:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:40:48,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:40:48,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:40:49,278 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 21:40:49,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523682103] [2020-09-24 21:40:49,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:40:49,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-24 21:40:49,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381194463] [2020-09-24 21:40:49,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:40:49,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:40:49,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:40:49,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:40:49,312 INFO L87 Difference]: Start difference. First operand 525 states. Second operand 18 states. [2020-09-24 21:40:49,974 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2020-09-24 21:40:50,277 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 92 [2020-09-24 21:40:50,607 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 90 [2020-09-24 21:40:50,987 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 89 [2020-09-24 21:40:51,563 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 88 [2020-09-24 21:40:52,859 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-09-24 21:40:53,568 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-09-24 21:40:54,462 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82 [2020-09-24 21:40:55,021 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2020-09-24 21:40:56,261 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-09-24 21:40:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:40:59,713 INFO L93 Difference]: Finished difference Result 1701 states and 2422 transitions. [2020-09-24 21:40:59,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 21:40:59,715 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-09-24 21:40:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:40:59,758 INFO L225 Difference]: With dead ends: 1701 [2020-09-24 21:40:59,759 INFO L226 Difference]: Without dead ends: 1103 [2020-09-24 21:40:59,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:40:59,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2020-09-24 21:40:59,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985. [2020-09-24 21:40:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 985 states. [2020-09-24 21:40:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1149 transitions. [2020-09-24 21:40:59,911 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1149 transitions. Word has length 139 [2020-09-24 21:40:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:40:59,912 INFO L479 AbstractCegarLoop]: Abstraction has 985 states and 1149 transitions. [2020-09-24 21:40:59,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:40:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1149 transitions. [2020-09-24 21:40:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-24 21:40:59,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:40:59,925 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, 1, 1, 1, 1] [2020-09-24 21:40:59,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:40:59,925 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:40:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:40:59,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1074396456, now seen corresponding path program 1 times [2020-09-24 21:40:59,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:40:59,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954161042] [2020-09-24 21:40:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:40:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:00,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:02,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:04,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:04,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-09-24 21:41:04,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-24 21:41:04,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-24 21:41:04,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:41:04,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:04,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-09-24 21:41:04,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:05,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:05,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:05,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:05,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:05,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-24 21:41:05,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:05,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:41:05,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:41:05,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:05,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:05,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 21:41:05,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:05,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-24 21:41:05,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:05,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:05,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:41:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:41:06,072 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 21:41:06,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954161042] [2020-09-24 21:41:06,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:06,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:41:06,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915669615] [2020-09-24 21:41:06,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:41:06,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:41:06,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:41:06,079 INFO L87 Difference]: Start difference. First operand 985 states and 1149 transitions. Second operand 21 states. [2020-09-24 21:41:06,812 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-09-24 21:41:07,080 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-09-24 21:41:07,830 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 89 [2020-09-24 21:41:09,575 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-09-24 21:41:10,057 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-09-24 21:41:10,486 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-09-24 21:41:10,940 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 80 [2020-09-24 21:41:11,334 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86 [2020-09-24 21:41:11,637 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-09-24 21:41:12,115 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-09-24 21:41:12,382 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-09-24 21:41:12,660 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-09-24 21:41:13,734 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-09-24 21:41:14,175 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-09-24 21:41:14,536 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-09-24 21:41:14,753 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-09-24 21:41:14,959 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-09-24 21:41:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:16,169 INFO L93 Difference]: Finished difference Result 2272 states and 2665 transitions. [2020-09-24 21:41:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:41:16,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 156 [2020-09-24 21:41:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:16,181 INFO L225 Difference]: With dead ends: 2272 [2020-09-24 21:41:16,182 INFO L226 Difference]: Without dead ends: 1375 [2020-09-24 21:41:16,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=717, Invalid=1833, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:41:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-09-24 21:41:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1226. [2020-09-24 21:41:16,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-09-24 21:41:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1424 transitions. [2020-09-24 21:41:16,269 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1424 transitions. Word has length 156 [2020-09-24 21:41:16,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:16,270 INFO L479 AbstractCegarLoop]: Abstraction has 1226 states and 1424 transitions. [2020-09-24 21:41:16,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:41:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1424 transitions. [2020-09-24 21:41:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-09-24 21:41:16,277 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:16,277 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, 1, 1, 1, 1] [2020-09-24 21:41:16,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:41:16,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash -727651786, now seen corresponding path program 1 times [2020-09-24 21:41:16,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:16,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012200220] [2020-09-24 21:41:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:16,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:18,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:20,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:21,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:21,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-09-24 21:41:21,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-24 21:41:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:41:21,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:41:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:41:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-09-24 21:41:21,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:21,850 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 30 [2020-09-24 21:41:21,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:41:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:21,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:22,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 21:41:22,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:41:22,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-24 21:41:22,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:41:22,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:41:22,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 21:41:22,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-09-24 21:41:22,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:41:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:22,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:22,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:41:22,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 21:41:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:41:22,375 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 21:41:22,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012200220] [2020-09-24 21:41:22,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:41:22,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:41:22,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45125245] [2020-09-24 21:41:22,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:41:22,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:41:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:41:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:41:22,378 INFO L87 Difference]: Start difference. First operand 1226 states and 1424 transitions. Second operand 13 states. [2020-09-24 21:41:26,801 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-09-24 21:41:29,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:41:29,341 INFO L93 Difference]: Finished difference Result 3232 states and 3955 transitions. [2020-09-24 21:41:29,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:41:29,341 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 160 [2020-09-24 21:41:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:41:29,351 INFO L225 Difference]: With dead ends: 3232 [2020-09-24 21:41:29,351 INFO L226 Difference]: Without dead ends: 1722 [2020-09-24 21:41:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=285, Invalid=645, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:41:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-09-24 21:41:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1514. [2020-09-24 21:41:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2020-09-24 21:41:29,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1745 transitions. [2020-09-24 21:41:29,417 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1745 transitions. Word has length 160 [2020-09-24 21:41:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:41:29,417 INFO L479 AbstractCegarLoop]: Abstraction has 1514 states and 1745 transitions. [2020-09-24 21:41:29,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:41:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1745 transitions. [2020-09-24 21:41:29,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 21:41:29,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:41:29,424 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-09-24 21:41:29,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:41:29,424 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:41:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:41:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1558363652, now seen corresponding path program 1 times [2020-09-24 21:41:29,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:41:29,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064410718] [2020-09-24 21:41:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:41:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:41:29,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:29,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:41:31,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking...