/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 --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 interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:30:18,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:30:18,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:30:18,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:30:18,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:30:18,521 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:30:18,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:30:18,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:30:18,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:30:18,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:30:18,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:30:18,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:30:18,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:30:18,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:30:18,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:30:18,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:30:18,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:30:18,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:30:18,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:30:18,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:30:18,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:30:18,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:30:18,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:30:18,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:30:18,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:30:18,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:30:18,553 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:30:18,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:30:18,555 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:30:18,556 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:30:18,556 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:30:18,557 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:30:18,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:30:18,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:30:18,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:30:18,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:30:18,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:30:18,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:30:18,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:30:18,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:30:18,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:30:18,566 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 [2020-09-21 11:30:18,624 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:30:18,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:30:18,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:30:18,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:30:18,627 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:30:18,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:30:18,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:30:18,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:30:18,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:30:18,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:30:18,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:30:18,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:30:18,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:30:18,630 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:30:18,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:30:18,630 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:30:18,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:30:18,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:30:18,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:30:18,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:30:18,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:30:18,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:30:18,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:30:18,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:30:18,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:30:18,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:30:18,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:30:18,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:30:18,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:30:18,633 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.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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:30:19,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:30:19,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:30:19,209 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:30:19,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:30:19,211 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:30:19,212 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-21 11:30:19,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fa26d82/d6d60ec5b9164f1298e21d7f004ffe30/FLAG0f1182af1 [2020-09-21 11:30:19,839 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:30:19,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-21 11:30:19,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fa26d82/d6d60ec5b9164f1298e21d7f004ffe30/FLAG0f1182af1 [2020-09-21 11:30:20,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/72fa26d82/d6d60ec5b9164f1298e21d7f004ffe30 [2020-09-21 11:30:20,191 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:30:20,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:30:20,199 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:20,199 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:30:20,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:30:20,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749394c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20, skipping insertion in model container [2020-09-21 11:30:20,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:30:20,245 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:30:20,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,485 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:30:20,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:30:20,533 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:30:20,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20 WrapperNode [2020-09-21 11:30:20,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:30:20,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:30:20,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:30:20,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,636 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (1/1) ... [2020-09-21 11:30:20,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:30:20,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:30:20,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:30:20,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:30:20,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (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 [2020-09-21 11:30:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:30:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:30:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:30:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:30:20,743 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:30:20,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:30:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:30:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:30:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:30:20,744 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:30:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 11:30:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:30:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:30:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 11:30:20,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:30:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:30:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:30:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:30:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:30:21,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:30:21,120 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:30:21,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:21 BoogieIcfgContainer [2020-09-21 11:30:21,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:30:21,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:30:21,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:30:21,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:30:21,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:30:20" (1/3) ... [2020-09-21 11:30:21,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328b74d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:21, skipping insertion in model container [2020-09-21 11:30:21,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:30:20" (2/3) ... [2020-09-21 11:30:21,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328b74d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:30:21, skipping insertion in model container [2020-09-21 11:30:21,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:30:21" (3/3) ... [2020-09-21 11:30:21,136 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-09-21 11:30:21,148 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:30:21,159 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:30:21,181 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:30:21,208 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:30:21,208 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:30:21,208 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:30:21,208 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:30:21,208 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:30:21,209 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:30:21,209 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:30:21,209 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:30:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 11:30:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:30:21,238 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,239 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] [2020-09-21 11:30:21,239 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-09-21 11:30:21,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824133353] [2020-09-21 11:30:21,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,418 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,418 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,419 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,419 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:30:21,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:30:21,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-21 11:30:21,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,497 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,498 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:21,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,513 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,514 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,514 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,515 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:21,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:21,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:21,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-21 11:30:21,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:21,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:21,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824133353] [2020-09-21 11:30:21,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:21,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:30:21,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89145924] [2020-09-21 11:30:21,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:30:21,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:30:21,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:30:21,575 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-09-21 11:30:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:21,716 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-09-21 11:30:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:30:21,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 11:30:21,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:21,733 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:30:21,733 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:30:21,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:30:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:30:21,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 11:30:21,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 11:30:21,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-09-21 11:30:21,786 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-09-21 11:30:21,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:21,787 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-09-21 11:30:21,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:30:21,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-09-21 11:30:21,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 11:30:21,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:21,789 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] [2020-09-21 11:30:21,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:30:21,790 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:21,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-09-21 11:30:21,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:21,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462157464] [2020-09-21 11:30:21,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,891 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,896 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,897 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-21 11:30:21,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:21,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:30:21,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:30:21,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:21,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:21,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:21,998 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:21,999 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:21,999 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:21,999 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:21,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:21,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,011 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,011 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,011 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:22,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:22,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462157464] [2020-09-21 11:30:22,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:22,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:30:22,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482573239] [2020-09-21 11:30:22,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:22,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:22,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:22,024 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-09-21 11:30:22,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,144 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 11:30:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:30:22,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 11:30:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,146 INFO L225 Difference]: With dead ends: 45 [2020-09-21 11:30:22,147 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:30:22,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:30:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:30:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 11:30:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 11:30:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 11:30:22,157 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-09-21 11:30:22,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,158 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 11:30:22,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 11:30:22,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 11:30:22,159 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,160 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] [2020-09-21 11:30:22,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:30:22,160 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-09-21 11:30:22,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705893421] [2020-09-21 11:30:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,223 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,224 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,224 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,224 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-09-21 11:30:22,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:30:22,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:30:22,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:30:22,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:30:22,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,374 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,375 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,375 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,375 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:22,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,386 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,386 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,386 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:22,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:30:22,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:22,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 11:30:22,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705893421] [2020-09-21 11:30:22,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:30:22,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 11:30:22,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19276255] [2020-09-21 11:30:22,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:30:22,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:30:22,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:30:22,397 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-09-21 11:30:22,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,597 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 11:30:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:30:22,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 11:30:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,599 INFO L225 Difference]: With dead ends: 39 [2020-09-21 11:30:22,599 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 11:30:22,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:30:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 11:30:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-21 11:30:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 11:30:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 11:30:22,608 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-09-21 11:30:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,608 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 11:30:22,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:30:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 11:30:22,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:30:22,609 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,610 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:22,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:30:22,610 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-09-21 11:30:22,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145797036] [2020-09-21 11:30:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,657 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,658 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,658 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,658 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:30:22,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:30:22,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:30:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:22,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:30:22,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,733 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,734 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,734 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,734 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:22,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,742 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,742 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,742 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,742 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:22,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:22,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:22,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:22,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:22,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145797036] [2020-09-21 11:30:22,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:22,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:30:22,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206287587] [2020-09-21 11:30:22,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:30:22,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:22,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:30:22,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:30:22,752 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-09-21 11:30:22,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:22,931 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 11:30:22,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:30:22,932 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-21 11:30:22,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:22,933 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:30:22,933 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:30:22,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:30:22,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:30:22,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 11:30:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 11:30:22,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-09-21 11:30:22,941 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-09-21 11:30:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:22,942 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-09-21 11:30:22,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:30:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-09-21 11:30:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:30:22,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:22,943 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-21 11:30:22,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:30:22,944 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-09-21 11:30:22,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:22,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970805399] [2020-09-21 11:30:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:22,989 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:22,989 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:22,989 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:22,990 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:22,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:30:22,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:22,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:30:22,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:22,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:30:22,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:22,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:22,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,098 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,099 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,106 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,106 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,106 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,106 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:23,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:30:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 11:30:23,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970805399] [2020-09-21 11:30:23,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:23,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:30:23,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435528146] [2020-09-21 11:30:23,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:30:23,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:23,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:30:23,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:23,117 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-09-21 11:30:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:23,220 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-09-21 11:30:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:30:23,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-21 11:30:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:23,222 INFO L225 Difference]: With dead ends: 55 [2020-09-21 11:30:23,222 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:30:23,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:30:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:30:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-21 11:30:23,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:30:23,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 11:30:23,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-09-21 11:30:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:23,231 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 11:30:23,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:30:23,231 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 11:30:23,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 11:30:23,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:23,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:23,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:30:23,233 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:23,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:23,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-09-21 11:30:23,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:23,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900677374] [2020-09-21 11:30:23,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,441 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:30:23,441 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,441 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,442 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-21 11:30:23,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-09-21 11:30:23,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:30:23,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:30:23,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:30:23,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:23,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,680 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,681 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,681 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,681 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:23,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:23,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:23,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:23,689 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:23,689 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:23,690 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:23,690 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:23,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:23,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:23,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:23,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:30:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:23,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:30:23,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:23,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:23,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900677374] [2020-09-21 11:30:23,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:23,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:30:23,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720647670] [2020-09-21 11:30:23,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:30:23,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:23,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:30:23,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:30:23,701 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 13 states. [2020-09-21 11:30:24,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:24,248 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-21 11:30:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:30:24,249 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 33 [2020-09-21 11:30:24,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:24,250 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:30:24,250 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:30:24,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:30:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:30:24,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-09-21 11:30:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 11:30:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-09-21 11:30:24,258 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-09-21 11:30:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:24,258 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-09-21 11:30:24,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:30:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-09-21 11:30:24,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:30:24,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:24,260 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:30:24,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:30:24,260 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:24,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:24,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-09-21 11:30:24,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:24,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743815446] [2020-09-21 11:30:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,303 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,303 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,303 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:30:24,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-21 11:30:24,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:30:24,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:30:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,385 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,386 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,386 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,386 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:30:24,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:24,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 11:30:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:30:24,392 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:30:24,392 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:30:24,392 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:30:24,392 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:30:24,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:30:24,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:30:24,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:30:24,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:30:24,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:30:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:30:24,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:30:24,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:30:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:30:24,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743815446] [2020-09-21 11:30:24,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:30:24,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:30:24,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517272475] [2020-09-21 11:30:24,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:30:24,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:30:24,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:30:24,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:30:24,400 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-09-21 11:30:24,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:30:24,631 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-09-21 11:30:24,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:30:24,632 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-21 11:30:24,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:30:24,633 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:30:24,633 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:30:24,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:30:24,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:30:24,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-21 11:30:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:30:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-21 11:30:24,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-09-21 11:30:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:30:24,641 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-21 11:30:24,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:30:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-21 11:30:24,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 11:30:24,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:30:24,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-09-21 11:30:24,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:30:24,643 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:30:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:30:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-09-21 11:30:24,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:30:24,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225682080] [2020-09-21 11:30:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:30:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:30:24,676 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:30:24,676 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:30:24,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:30:24,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:30:24 BoogieIcfgContainer [2020-09-21 11:30:24,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:30:24,708 INFO L168 Benchmark]: Toolchain (without parser) took 4513.18 ms. Allocated memory was 137.4 MB in the beginning and 251.7 MB in the end (delta: 114.3 MB). Free memory was 100.7 MB in the beginning and 213.7 MB in the end (delta: -113.0 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:24,709 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:30:24,709 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.07 ms. Allocated memory is still 137.4 MB. Free memory was 100.2 MB in the beginning and 89.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:24,710 INFO L168 Benchmark]: Boogie Preprocessor took 129.80 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 177.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:24,711 INFO L168 Benchmark]: RCFGBuilder took 460.82 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:30:24,712 INFO L168 Benchmark]: TraceAbstraction took 3576.98 ms. Allocated memory was 200.3 MB in the beginning and 251.7 MB in the end (delta: 51.4 MB). Free memory was 159.4 MB in the beginning and 213.7 MB in the end (delta: -54.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:30:24,716 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.5 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 336.07 ms. Allocated memory is still 137.4 MB. Free memory was 100.2 MB in the beginning and 89.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.80 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 89.7 MB in the beginning and 177.6 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 460.82 ms. Allocated memory is still 200.3 MB. Free memory was 177.6 MB in the beginning and 160.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3576.98 ms. Allocated memory was 200.3 MB in the beginning and 251.7 MB in the end (delta: 51.4 MB). Free memory was 159.4 MB in the beginning and 213.7 MB in the end (delta: -54.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i