/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:33:32,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:33:32,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:33:32,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:33:32,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:33:32,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:33:32,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:33:32,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:33:32,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:33:32,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:33:32,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:33:32,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:33:32,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:33:32,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:33:32,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:33:32,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:33:32,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:33:32,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:33:32,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:33:32,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:33:32,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:33:32,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:33:32,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:33:32,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:33:32,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:33:32,541 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:33:32,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:33:32,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:33:32,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:33:32,543 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:33:32,543 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:33:32,544 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:33:32,545 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:33:32,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:33:32,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:33:32,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:33:32,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:33:32,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:33:32,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:33:32,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:33:32,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:33:32,550 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:33:32,571 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:33:32,572 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:33:32,573 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:33:32,573 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:33:32,573 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:33:32,573 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:33:32,573 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:33:32,574 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:33:32,575 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:33:32,575 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:33:32,575 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:33:32,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:33:32,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:33:32,576 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:33:32,576 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:33:32,576 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:33:32,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:33:32,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:33:32,576 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:33:32,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:33:32,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:33:32,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:33:32,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:33:32,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:33:32,578 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:33:32,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:33:32,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:33:32,907 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:33:32,909 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:33:32,909 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:33:32,910 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:33:32,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cab376157/cce1416c3f05410788c50a25a92ef252/FLAG9125560c9 [2020-10-12 19:33:33,475 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:33:33,475 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:33:33,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cab376157/cce1416c3f05410788c50a25a92ef252/FLAG9125560c9 [2020-10-12 19:33:33,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cab376157/cce1416c3f05410788c50a25a92ef252 [2020-10-12 19:33:33,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:33:33,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:33:33,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:33:33,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:33:33,855 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:33:33,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:33:33" (1/1) ... [2020-10-12 19:33:33,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:33, skipping insertion in model container [2020-10-12 19:33:33,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:33:33" (1/1) ... [2020-10-12 19:33:33,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:33:33,911 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:33:34,284 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:33:34,303 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:33:34,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:33:34,402 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:33:34,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34 WrapperNode [2020-10-12 19:33:34,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:33:34,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:33:34,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:33:34,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:33:34,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... [2020-10-12 19:33:34,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:33:34,468 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:33:34,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:33:34,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:33:34,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:33:34,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:33:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:33:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:33:34,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:33:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:33:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:33:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:33:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:33:34,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:33:34,538 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:33:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:33:35,222 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:33:35,222 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:33:35,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:33:35 BoogieIcfgContainer [2020-10-12 19:33:35,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:33:35,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:33:35,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:33:35,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:33:35,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:33:33" (1/3) ... [2020-10-12 19:33:35,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23796b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:33:35, skipping insertion in model container [2020-10-12 19:33:35,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:33:34" (2/3) ... [2020-10-12 19:33:35,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23796b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:33:35, skipping insertion in model container [2020-10-12 19:33:35,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:33:35" (3/3) ... [2020-10-12 19:33:35,245 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 19:33:35,256 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:33:35,263 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:33:35,278 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:33:35,302 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:33:35,303 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:33:35,303 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:33:35,303 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:33:35,303 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:33:35,304 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:33:35,304 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:33:35,304 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:33:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-10-12 19:33:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:33:35,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:35,336 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] [2020-10-12 19:33:35,337 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash -998305872, now seen corresponding path program 1 times [2020-10-12 19:33:35,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:35,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083309793] [2020-10-12 19:33:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:37,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:37,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:40,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:40,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:33:40,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:33:40,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:33:40,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:40,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:40,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:33:40,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:33:40,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 19:33:40,958 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:33:40,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:40,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:41,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:41,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:41,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:41,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-12 19:33:41,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:41,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:41,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:41,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:41,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083309793] [2020-10-12 19:33:41,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:41,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:41,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998172717] [2020-10-12 19:33:41,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:41,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:41,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:41,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:41,075 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 7 states. [2020-10-12 19:33:41,298 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:33:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:42,710 INFO L93 Difference]: Finished difference Result 662 states and 1059 transitions. [2020-10-12 19:33:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:42,712 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-12 19:33:42,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:42,730 INFO L225 Difference]: With dead ends: 662 [2020-10-12 19:33:42,730 INFO L226 Difference]: Without dead ends: 540 [2020-10-12 19:33:42,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:33:42,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-10-12 19:33:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 265. [2020-10-12 19:33:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-12 19:33:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 386 transitions. [2020-10-12 19:33:42,819 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 386 transitions. Word has length 66 [2020-10-12 19:33:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:42,820 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 386 transitions. [2020-10-12 19:33:42,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 386 transitions. [2020-10-12 19:33:42,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:33:42,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:42,826 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] [2020-10-12 19:33:42,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:33:42,827 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash 898837651, now seen corresponding path program 1 times [2020-10-12 19:33:42,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:42,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920342827] [2020-10-12 19:33:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:44,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:45,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:47,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:33:47,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:33:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:33:47,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:33:47,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:47,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:33:47,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-10-12 19:33:48,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:48,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:48,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:48,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:48,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:33:48,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:48,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:48,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:48,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:48,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920342827] [2020-10-12 19:33:48,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:48,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:33:48,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902310515] [2020-10-12 19:33:48,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:33:48,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:48,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:33:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:33:48,560 INFO L87 Difference]: Start difference. First operand 265 states and 386 transitions. Second operand 12 states. [2020-10-12 19:33:48,857 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-12 19:33:49,542 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:33:49,795 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:33:50,262 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 19:33:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:53,466 INFO L93 Difference]: Finished difference Result 2942 states and 4558 transitions. [2020-10-12 19:33:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 19:33:53,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 19:33:53,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:53,485 INFO L225 Difference]: With dead ends: 2942 [2020-10-12 19:33:53,485 INFO L226 Difference]: Without dead ends: 2748 [2020-10-12 19:33:53,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 19:33:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2748 states. [2020-10-12 19:33:53,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2748 to 621. [2020-10-12 19:33:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-10-12 19:33:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 931 transitions. [2020-10-12 19:33:53,602 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 931 transitions. Word has length 67 [2020-10-12 19:33:53,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:53,603 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 931 transitions. [2020-10-12 19:33:53,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:33:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 931 transitions. [2020-10-12 19:33:53,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:33:53,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:53,606 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] [2020-10-12 19:33:53,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:33:53,606 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1757298207, now seen corresponding path program 1 times [2020-10-12 19:33:53,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:53,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706483075] [2020-10-12 19:33:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:53,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:55,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:56,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:58,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:33:58,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:33:58,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:33:58,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:33:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:58,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:33:58,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:59,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:59,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:59,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:59,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:59,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:59,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:59,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:59,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:59,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:59,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706483075] [2020-10-12 19:33:59,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:59,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:33:59,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132758976] [2020-10-12 19:33:59,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:33:59,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:59,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:33:59,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:33:59,049 INFO L87 Difference]: Start difference. First operand 621 states and 931 transitions. Second operand 12 states. [2020-10-12 19:33:59,233 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:34:01,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:01,914 INFO L93 Difference]: Finished difference Result 3080 states and 4751 transitions. [2020-10-12 19:34:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:34:01,915 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-12 19:34:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:01,927 INFO L225 Difference]: With dead ends: 3080 [2020-10-12 19:34:01,928 INFO L226 Difference]: Without dead ends: 2657 [2020-10-12 19:34:01,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=1011, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:34:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2020-10-12 19:34:02,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 621. [2020-10-12 19:34:02,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2020-10-12 19:34:02,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 929 transitions. [2020-10-12 19:34:02,015 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 929 transitions. Word has length 68 [2020-10-12 19:34:02,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:02,015 INFO L479 AbstractCegarLoop]: Abstraction has 621 states and 929 transitions. [2020-10-12 19:34:02,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:34:02,015 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 929 transitions. [2020-10-12 19:34:02,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:34:02,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:02,017 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] [2020-10-12 19:34:02,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:34:02,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash 169921552, now seen corresponding path program 1 times [2020-10-12 19:34:02,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:02,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254686134] [2020-10-12 19:34:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:02,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:02,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:02,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:02,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:06,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:07,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:07,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:34:07,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:34:07,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:34:07,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:07,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:34:07,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:34:07,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:34:07,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:07,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:07,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:07,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:07,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:07,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:34:07,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:07,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:07,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:07,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254686134] [2020-10-12 19:34:07,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:07,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:34:07,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15112435] [2020-10-12 19:34:07,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:34:07,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:07,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:34:07,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:34:07,575 INFO L87 Difference]: Start difference. First operand 621 states and 929 transitions. Second operand 12 states. [2020-10-12 19:34:07,833 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-12 19:34:10,235 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-12 19:34:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:11,855 INFO L93 Difference]: Finished difference Result 3461 states and 5330 transitions. [2020-10-12 19:34:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:34:11,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-12 19:34:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:11,872 INFO L225 Difference]: With dead ends: 3461 [2020-10-12 19:34:11,872 INFO L226 Difference]: Without dead ends: 3134 [2020-10-12 19:34:11,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=270, Invalid=1062, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:34:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2020-10-12 19:34:11,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 638. [2020-10-12 19:34:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 638 states. [2020-10-12 19:34:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 949 transitions. [2020-10-12 19:34:11,983 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 949 transitions. Word has length 68 [2020-10-12 19:34:11,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:11,984 INFO L479 AbstractCegarLoop]: Abstraction has 638 states and 949 transitions. [2020-10-12 19:34:11,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:34:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 949 transitions. [2020-10-12 19:34:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:34:11,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:11,985 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] [2020-10-12 19:34:11,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:34:11,986 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2097698280, now seen corresponding path program 1 times [2020-10-12 19:34:11,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:11,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049536239] [2020-10-12 19:34:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:12,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:14,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:17,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:17,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:34:17,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:17,191 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:34:17,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:17,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:17,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:17,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:17,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:17,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:34:17,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:17,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:17,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:17,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:17,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049536239] [2020-10-12 19:34:17,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:17,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:17,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229494101] [2020-10-12 19:34:17,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:17,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:17,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:17,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:17,250 INFO L87 Difference]: Start difference. First operand 638 states and 949 transitions. Second operand 7 states. [2020-10-12 19:34:17,451 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:34:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:18,793 INFO L93 Difference]: Finished difference Result 1914 states and 2963 transitions. [2020-10-12 19:34:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:34:18,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 19:34:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:18,802 INFO L225 Difference]: With dead ends: 1914 [2020-10-12 19:34:18,802 INFO L226 Difference]: Without dead ends: 1676 [2020-10-12 19:34:18,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:34:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2020-10-12 19:34:18,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 669. [2020-10-12 19:34:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-10-12 19:34:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1005 transitions. [2020-10-12 19:34:18,902 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1005 transitions. Word has length 68 [2020-10-12 19:34:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:18,902 INFO L479 AbstractCegarLoop]: Abstraction has 669 states and 1005 transitions. [2020-10-12 19:34:18,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1005 transitions. [2020-10-12 19:34:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:34:18,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:18,904 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] [2020-10-12 19:34:18,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:34:18,905 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:18,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:18,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1882522096, now seen corresponding path program 1 times [2020-10-12 19:34:18,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:18,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [240541930] [2020-10-12 19:34:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:18,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:20,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:20,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:23,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:23,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:34:23,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:34:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:24,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:24,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:24,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:24,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:34:24,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:24,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:24,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:24,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [240541930] [2020-10-12 19:34:24,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:24,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:34:24,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676383248] [2020-10-12 19:34:24,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:34:24,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:24,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:34:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:24,433 INFO L87 Difference]: Start difference. First operand 669 states and 1005 transitions. Second operand 15 states. [2020-10-12 19:34:24,772 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 128 [2020-10-12 19:34:25,488 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-10-12 19:34:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:28,910 INFO L93 Difference]: Finished difference Result 2489 states and 3832 transitions. [2020-10-12 19:34:28,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:34:28,911 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-12 19:34:28,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:28,920 INFO L225 Difference]: With dead ends: 2489 [2020-10-12 19:34:28,920 INFO L226 Difference]: Without dead ends: 2028 [2020-10-12 19:34:28,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:34:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2020-10-12 19:34:29,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 675. [2020-10-12 19:34:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 675 states. [2020-10-12 19:34:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1009 transitions. [2020-10-12 19:34:29,036 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1009 transitions. Word has length 69 [2020-10-12 19:34:29,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:29,036 INFO L479 AbstractCegarLoop]: Abstraction has 675 states and 1009 transitions. [2020-10-12 19:34:29,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:34:29,036 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1009 transitions. [2020-10-12 19:34:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:34:29,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:29,038 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] [2020-10-12 19:34:29,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:34:29,038 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:29,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:29,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2026715585, now seen corresponding path program 1 times [2020-10-12 19:34:29,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:29,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673468157] [2020-10-12 19:34:29,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:29,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:29,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:30,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:34,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:34:34,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:34:34,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:34:34,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:34:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:34:34,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:34:34,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:34,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:34,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:34,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:34,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:34,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:34,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673468157] [2020-10-12 19:34:34,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:34,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:34:34,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212056678] [2020-10-12 19:34:34,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:34:34,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:34,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:34:34,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:34:34,401 INFO L87 Difference]: Start difference. First operand 675 states and 1009 transitions. Second operand 12 states. [2020-10-12 19:34:34,618 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 19:34:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:38,524 INFO L93 Difference]: Finished difference Result 2892 states and 4462 transitions. [2020-10-12 19:34:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 19:34:38,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2020-10-12 19:34:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:38,534 INFO L225 Difference]: With dead ends: 2892 [2020-10-12 19:34:38,534 INFO L226 Difference]: Without dead ends: 2595 [2020-10-12 19:34:38,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=1755, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 19:34:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2020-10-12 19:34:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 740. [2020-10-12 19:34:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-10-12 19:34:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1093 transitions. [2020-10-12 19:34:38,665 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1093 transitions. Word has length 69 [2020-10-12 19:34:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:38,665 INFO L479 AbstractCegarLoop]: Abstraction has 740 states and 1093 transitions. [2020-10-12 19:34:38,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:34:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1093 transitions. [2020-10-12 19:34:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:34:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:38,667 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] [2020-10-12 19:34:38,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:34:38,667 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -494206532, now seen corresponding path program 1 times [2020-10-12 19:34:38,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:38,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858889341] [2020-10-12 19:34:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:38,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:39,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:34:43,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:43,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:34:43,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:44,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:44,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:44,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:44,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:44,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:44,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:44,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:34:44,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:44,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:44,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858889341] [2020-10-12 19:34:44,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:44,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:34:44,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137489291] [2020-10-12 19:34:44,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:34:44,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:34:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:44,092 INFO L87 Difference]: Start difference. First operand 740 states and 1093 transitions. Second operand 15 states. [2020-10-12 19:34:44,474 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 132 [2020-10-12 19:34:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:48,824 INFO L93 Difference]: Finished difference Result 3077 states and 4718 transitions. [2020-10-12 19:34:48,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 19:34:48,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 69 [2020-10-12 19:34:48,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:48,833 INFO L225 Difference]: With dead ends: 3077 [2020-10-12 19:34:48,833 INFO L226 Difference]: Without dead ends: 2877 [2020-10-12 19:34:48,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=540, Invalid=2766, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 19:34:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2020-10-12 19:34:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 745. [2020-10-12 19:34:48,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2020-10-12 19:34:48,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1099 transitions. [2020-10-12 19:34:48,956 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1099 transitions. Word has length 69 [2020-10-12 19:34:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:48,956 INFO L479 AbstractCegarLoop]: Abstraction has 745 states and 1099 transitions. [2020-10-12 19:34:48,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:34:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1099 transitions. [2020-10-12 19:34:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:34:48,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:48,957 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] [2020-10-12 19:34:48,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:34:48,957 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:48,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:48,958 INFO L82 PathProgramCache]: Analyzing trace with hash -779612352, now seen corresponding path program 1 times [2020-10-12 19:34:48,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:48,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021192112] [2020-10-12 19:34:48,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:48,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:49,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:49,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:49,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:49,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:49,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:50,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:34:53,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:34:53,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:34:53,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:54,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:54,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:54,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:54,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:54,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:54,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:34:54,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:54,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:54,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:54,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:54,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:54,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021192112] [2020-10-12 19:34:54,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:54,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:34:54,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141792516] [2020-10-12 19:34:54,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:34:54,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:54,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:34:54,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:54,400 INFO L87 Difference]: Start difference. First operand 745 states and 1099 transitions. Second operand 15 states. [2020-10-12 19:34:54,596 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:34:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:58,315 INFO L93 Difference]: Finished difference Result 3190 states and 4866 transitions. [2020-10-12 19:34:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:34:58,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-12 19:34:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:58,324 INFO L225 Difference]: With dead ends: 3190 [2020-10-12 19:34:58,324 INFO L226 Difference]: Without dead ends: 2885 [2020-10-12 19:34:58,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:34:58,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2020-10-12 19:34:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 755. [2020-10-12 19:34:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-10-12 19:34:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1113 transitions. [2020-10-12 19:34:58,476 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1113 transitions. Word has length 70 [2020-10-12 19:34:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:58,476 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 1113 transitions. [2020-10-12 19:34:58,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:34:58,476 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1113 transitions. [2020-10-12 19:34:58,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:34:58,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:58,477 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] [2020-10-12 19:34:58,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:34:58,477 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash -562645102, now seen corresponding path program 1 times [2020-10-12 19:34:58,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:58,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338321773] [2020-10-12 19:34:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:00,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:03,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:03,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:03,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:35:03,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:03,761 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 28 [2020-10-12 19:35:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:04,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:04,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:04,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:04,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338321773] [2020-10-12 19:35:04,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:04,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:35:04,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466375459] [2020-10-12 19:35:04,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:35:04,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:04,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:35:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:35:04,102 INFO L87 Difference]: Start difference. First operand 755 states and 1113 transitions. Second operand 15 states. [2020-10-12 19:35:04,307 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-12 19:35:04,919 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-12 19:35:05,081 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 19:35:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:08,426 INFO L93 Difference]: Finished difference Result 2433 states and 3731 transitions. [2020-10-12 19:35:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 19:35:08,426 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 70 [2020-10-12 19:35:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:08,433 INFO L225 Difference]: With dead ends: 2433 [2020-10-12 19:35:08,433 INFO L226 Difference]: Without dead ends: 2128 [2020-10-12 19:35:08,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=211, Invalid=1049, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:35:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2020-10-12 19:35:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 755. [2020-10-12 19:35:08,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-10-12 19:35:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1113 transitions. [2020-10-12 19:35:08,565 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1113 transitions. Word has length 70 [2020-10-12 19:35:08,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:08,566 INFO L479 AbstractCegarLoop]: Abstraction has 755 states and 1113 transitions. [2020-10-12 19:35:08,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:35:08,566 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1113 transitions. [2020-10-12 19:35:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:35:08,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:08,567 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] [2020-10-12 19:35:08,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:35:08,567 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash -640337906, now seen corresponding path program 1 times [2020-10-12 19:35:08,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:08,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044421726] [2020-10-12 19:35:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:08,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:08,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:08,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:08,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:08,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:08,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:09,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:11,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:11,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:11,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:13,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:35:13,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:35:13,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:14,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:14,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:14,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:14,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:14,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:14,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:35:14,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:35:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:14,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:35:14,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:14,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044421726] [2020-10-12 19:35:14,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:14,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:35:14,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685978663] [2020-10-12 19:35:14,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 19:35:14,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 19:35:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:35:14,068 INFO L87 Difference]: Start difference. First operand 755 states and 1113 transitions. Second operand 16 states. [2020-10-12 19:35:14,514 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 139 [2020-10-12 19:35:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:20,195 INFO L93 Difference]: Finished difference Result 2883 states and 4415 transitions. [2020-10-12 19:35:20,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 19:35:20,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 70 [2020-10-12 19:35:20,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:20,206 INFO L225 Difference]: With dead ends: 2883 [2020-10-12 19:35:20,206 INFO L226 Difference]: Without dead ends: 2422 [2020-10-12 19:35:20,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=511, Invalid=2351, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 19:35:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2020-10-12 19:35:20,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 744. [2020-10-12 19:35:20,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-12 19:35:20,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1097 transitions. [2020-10-12 19:35:20,373 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1097 transitions. Word has length 70 [2020-10-12 19:35:20,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:20,373 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1097 transitions. [2020-10-12 19:35:20,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 19:35:20,374 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1097 transitions. [2020-10-12 19:35:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:35:20,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:20,375 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] [2020-10-12 19:35:20,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:35:20,375 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:20,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1774892043, now seen corresponding path program 1 times [2020-10-12 19:35:20,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:20,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934437960] [2020-10-12 19:35:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:20,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:21,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1214 [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:35:21,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:35:21,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:35:21,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:21,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:21,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:21,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:21,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:21,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:21,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934437960] [2020-10-12 19:35:21,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:21,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:35:21,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985996340] [2020-10-12 19:35:21,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:35:21,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:21,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:35:21,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:35:21,767 INFO L87 Difference]: Start difference. First operand 744 states and 1097 transitions. Second operand 7 states. [2020-10-12 19:35:21,917 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 19:35:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:23,698 INFO L93 Difference]: Finished difference Result 4525 states and 7055 transitions. [2020-10-12 19:35:23,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:35:23,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 19:35:23,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:23,711 INFO L225 Difference]: With dead ends: 4525 [2020-10-12 19:35:23,711 INFO L226 Difference]: Without dead ends: 4088 [2020-10-12 19:35:23,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:35:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2020-10-12 19:35:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 1320. [2020-10-12 19:35:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-10-12 19:35:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1973 transitions. [2020-10-12 19:35:24,014 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1973 transitions. Word has length 70 [2020-10-12 19:35:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:24,015 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1973 transitions. [2020-10-12 19:35:24,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:35:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1973 transitions. [2020-10-12 19:35:24,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:35:24,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:24,016 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] [2020-10-12 19:35:24,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:35:24,016 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:24,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:24,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1655953777, now seen corresponding path program 1 times [2020-10-12 19:35:24,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:24,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302172770] [2020-10-12 19:35:24,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:24,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:24,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:24,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:25,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:29,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:35:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:35:29,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:29,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:29,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:29,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:29,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:29,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:29,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302172770] [2020-10-12 19:35:29,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:29,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:35:29,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044546468] [2020-10-12 19:35:29,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:35:29,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:29,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:35:29,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:35:29,320 INFO L87 Difference]: Start difference. First operand 1320 states and 1973 transitions. Second operand 10 states. [2020-10-12 19:35:29,465 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-12 19:35:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:31,224 INFO L93 Difference]: Finished difference Result 4415 states and 6769 transitions. [2020-10-12 19:35:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:35:31,224 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-12 19:35:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:31,231 INFO L225 Difference]: With dead ends: 4415 [2020-10-12 19:35:31,232 INFO L226 Difference]: Without dead ends: 3465 [2020-10-12 19:35:31,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 19:35:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2020-10-12 19:35:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 1315. [2020-10-12 19:35:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2020-10-12 19:35:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1957 transitions. [2020-10-12 19:35:31,662 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1957 transitions. Word has length 71 [2020-10-12 19:35:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:31,663 INFO L479 AbstractCegarLoop]: Abstraction has 1315 states and 1957 transitions. [2020-10-12 19:35:31,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:35:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1957 transitions. [2020-10-12 19:35:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:35:31,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:31,669 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] [2020-10-12 19:35:31,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:35:31,669 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:31,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:31,669 INFO L82 PathProgramCache]: Analyzing trace with hash -75171120, now seen corresponding path program 1 times [2020-10-12 19:35:31,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:31,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639948243] [2020-10-12 19:35:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:31,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:31,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:31,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:31,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:33,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:33,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:36,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:35:36,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:37,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:37,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:37,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:37,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639948243] [2020-10-12 19:35:37,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:37,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:35:37,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836510944] [2020-10-12 19:35:37,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:35:37,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:35:37,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:35:37,180 INFO L87 Difference]: Start difference. First operand 1315 states and 1957 transitions. Second operand 17 states. [2020-10-12 19:35:37,344 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-12 19:35:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:41,754 INFO L93 Difference]: Finished difference Result 5225 states and 8031 transitions. [2020-10-12 19:35:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:35:41,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-12 19:35:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:41,763 INFO L225 Difference]: With dead ends: 5225 [2020-10-12 19:35:41,763 INFO L226 Difference]: Without dead ends: 4921 [2020-10-12 19:35:41,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2020-10-12 19:35:41,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4921 states. [2020-10-12 19:35:42,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4921 to 1353. [2020-10-12 19:35:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1353 states. [2020-10-12 19:35:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2004 transitions. [2020-10-12 19:35:42,133 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2004 transitions. Word has length 71 [2020-10-12 19:35:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:42,133 INFO L479 AbstractCegarLoop]: Abstraction has 1353 states and 2004 transitions. [2020-10-12 19:35:42,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 19:35:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2004 transitions. [2020-10-12 19:35:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:35:42,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:42,135 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] [2020-10-12 19:35:42,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:35:42,135 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -413424298, now seen corresponding path program 1 times [2020-10-12 19:35:42,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:42,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796738037] [2020-10-12 19:35:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:42,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:42,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:44,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:44,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:35:47,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:47,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:35:47,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:47,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:47,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:47,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:47,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:47,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:47,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796738037] [2020-10-12 19:35:47,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:47,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:35:47,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744869767] [2020-10-12 19:35:47,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:35:47,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:47,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:35:47,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:35:47,769 INFO L87 Difference]: Start difference. First operand 1353 states and 2004 transitions. Second operand 14 states. [2020-10-12 19:35:47,907 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 19:35:48,389 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 141 [2020-10-12 19:35:49,005 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-12 19:35:49,165 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 19:35:49,343 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-12 19:35:49,506 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 19:35:50,698 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-12 19:35:52,829 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 19:35:53,233 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 19:35:54,661 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-12 19:35:55,723 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 19:35:56,090 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-12 19:35:56,582 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-12 19:35:57,636 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-12 19:35:59,792 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-12 19:35:59,946 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-12 19:36:00,435 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-12 19:36:01,049 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-12 19:36:01,371 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-12 19:36:01,727 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-12 19:36:03,327 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 45 [2020-10-12 19:36:03,920 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-12 19:36:04,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:04,918 INFO L93 Difference]: Finished difference Result 17933 states and 27588 transitions. [2020-10-12 19:36:04,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 19:36:04,918 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-12 19:36:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:04,951 INFO L225 Difference]: With dead ends: 17933 [2020-10-12 19:36:04,951 INFO L226 Difference]: Without dead ends: 17345 [2020-10-12 19:36:04,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1108, Invalid=5212, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 19:36:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2020-10-12 19:36:05,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 1419. [2020-10-12 19:36:05,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1419 states. [2020-10-12 19:36:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1419 states to 1419 states and 2093 transitions. [2020-10-12 19:36:05,436 INFO L78 Accepts]: Start accepts. Automaton has 1419 states and 2093 transitions. Word has length 71 [2020-10-12 19:36:05,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:05,437 INFO L479 AbstractCegarLoop]: Abstraction has 1419 states and 2093 transitions. [2020-10-12 19:36:05,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:36:05,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1419 states and 2093 transitions. [2020-10-12 19:36:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:36:05,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:05,439 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] [2020-10-12 19:36:05,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:36:05,439 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:05,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:05,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1933672744, now seen corresponding path program 1 times [2020-10-12 19:36:05,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:05,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314298648] [2020-10-12 19:36:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:05,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:05,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:05,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:05,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:06,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:06,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:07,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:10,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:10,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:36:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:36:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:36:10,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:36:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:36:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:10,884 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:36:10,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:10,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:10,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:10,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:10,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:10,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314298648] [2020-10-12 19:36:10,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:10,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:36:10,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921852031] [2020-10-12 19:36:10,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:36:10,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:36:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:36:10,924 INFO L87 Difference]: Start difference. First operand 1419 states and 2093 transitions. Second operand 15 states. [2020-10-12 19:36:11,178 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-12 19:36:15,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:15,673 INFO L93 Difference]: Finished difference Result 4615 states and 7027 transitions. [2020-10-12 19:36:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 19:36:15,674 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-12 19:36:15,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:15,678 INFO L225 Difference]: With dead ends: 4615 [2020-10-12 19:36:15,678 INFO L226 Difference]: Without dead ends: 3569 [2020-10-12 19:36:15,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=717, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:36:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2020-10-12 19:36:16,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 1117. [2020-10-12 19:36:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1117 states. [2020-10-12 19:36:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1609 transitions. [2020-10-12 19:36:16,158 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1609 transitions. Word has length 71 [2020-10-12 19:36:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:16,158 INFO L479 AbstractCegarLoop]: Abstraction has 1117 states and 1609 transitions. [2020-10-12 19:36:16,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:36:16,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1609 transitions. [2020-10-12 19:36:16,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:36:16,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:16,161 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] [2020-10-12 19:36:16,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:36:16,161 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash -658023791, now seen corresponding path program 1 times [2020-10-12 19:36:16,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:16,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227265194] [2020-10-12 19:36:16,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:16,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:16,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:16,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:16,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:16,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:17,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:18,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:18,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:19,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:19,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:21,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:36:21,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:36:21,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:36:21,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:36:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:36:21,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:36:21,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:21,883 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:36:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:21,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:21,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:21,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:21,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:21,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:36:21,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:21,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:36:21,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:21,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:36:21,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:21,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227265194] [2020-10-12 19:36:21,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:21,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:36:21,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765715144] [2020-10-12 19:36:21,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:36:21,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:36:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:36:21,960 INFO L87 Difference]: Start difference. First operand 1117 states and 1609 transitions. Second operand 15 states. [2020-10-12 19:36:22,541 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 134 [2020-10-12 19:36:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:29,920 INFO L93 Difference]: Finished difference Result 8046 states and 12188 transitions. [2020-10-12 19:36:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 19:36:29,921 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-12 19:36:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:29,927 INFO L225 Difference]: With dead ends: 8046 [2020-10-12 19:36:29,927 INFO L226 Difference]: Without dead ends: 7438 [2020-10-12 19:36:29,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=576, Invalid=1974, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 19:36:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7438 states. [2020-10-12 19:36:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7438 to 1147. [2020-10-12 19:36:30,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2020-10-12 19:36:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1655 transitions. [2020-10-12 19:36:30,324 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1655 transitions. Word has length 71 [2020-10-12 19:36:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:30,325 INFO L479 AbstractCegarLoop]: Abstraction has 1147 states and 1655 transitions. [2020-10-12 19:36:30,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:36:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1655 transitions. [2020-10-12 19:36:30,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:36:30,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:30,327 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] [2020-10-12 19:36:30,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:36:30,327 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1334759630, now seen corresponding path program 1 times [2020-10-12 19:36:30,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:30,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286238853] [2020-10-12 19:36:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:30,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:30,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:31,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:31,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:35,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:36:35,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:35,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:35,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:35,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:35,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:35,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:35,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286238853] [2020-10-12 19:36:35,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:35,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:36:35,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846575123] [2020-10-12 19:36:35,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:36:35,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:36:35,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:36:35,681 INFO L87 Difference]: Start difference. First operand 1147 states and 1655 transitions. Second operand 10 states. [2020-10-12 19:36:35,836 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-12 19:36:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:38,662 INFO L93 Difference]: Finished difference Result 3693 states and 5589 transitions. [2020-10-12 19:36:38,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:36:38,662 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 71 [2020-10-12 19:36:38,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:38,665 INFO L225 Difference]: With dead ends: 3693 [2020-10-12 19:36:38,665 INFO L226 Difference]: Without dead ends: 3070 [2020-10-12 19:36:38,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:36:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3070 states. [2020-10-12 19:36:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3070 to 1126. [2020-10-12 19:36:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2020-10-12 19:36:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1613 transitions. [2020-10-12 19:36:39,047 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1613 transitions. Word has length 71 [2020-10-12 19:36:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:39,047 INFO L479 AbstractCegarLoop]: Abstraction has 1126 states and 1613 transitions. [2020-10-12 19:36:39,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:36:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1613 transitions. [2020-10-12 19:36:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:36:39,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:39,049 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] [2020-10-12 19:36:39,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:36:39,049 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:39,050 INFO L82 PathProgramCache]: Analyzing trace with hash -512891792, now seen corresponding path program 1 times [2020-10-12 19:36:39,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:39,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646336435] [2020-10-12 19:36:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:39,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:39,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:40,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:40,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:43,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:44,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:44,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:36:44,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-12 19:36:44,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:36:44,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:36:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:36:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:36:44,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:44,509 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-10-12 19:36:44,975 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:36:44,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:44,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:44,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:44,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:44,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:44,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:36:44,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:44,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:44,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:45,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646336435] [2020-10-12 19:36:45,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:45,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:36:45,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118018793] [2020-10-12 19:36:45,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:36:45,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:45,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:36:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:36:45,029 INFO L87 Difference]: Start difference. First operand 1126 states and 1613 transitions. Second operand 17 states. [2020-10-12 19:36:45,264 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-12 19:36:45,421 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-12 19:36:45,889 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 141 [2020-10-12 19:36:46,428 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-12 19:36:46,970 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-12 19:36:49,193 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-10-12 19:36:49,638 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-12 19:36:50,553 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-12 19:36:52,035 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-10-12 19:36:52,314 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-10-12 19:36:52,554 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2020-10-12 19:36:52,959 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 43 [2020-10-12 19:36:53,468 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-12 19:36:55,849 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-10-12 19:36:56,042 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-10-12 19:36:56,288 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-12 19:36:56,536 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-12 19:36:57,761 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-12 19:36:57,997 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-12 19:36:58,252 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-12 19:36:58,502 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-12 19:36:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:59,015 INFO L93 Difference]: Finished difference Result 5365 states and 7901 transitions. [2020-10-12 19:36:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 19:36:59,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-10-12 19:36:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:59,020 INFO L225 Difference]: With dead ends: 5365 [2020-10-12 19:36:59,020 INFO L226 Difference]: Without dead ends: 5164 [2020-10-12 19:36:59,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=817, Invalid=3875, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 19:36:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5164 states. [2020-10-12 19:36:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5164 to 1131. [2020-10-12 19:36:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-10-12 19:36:59,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1619 transitions. [2020-10-12 19:36:59,364 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1619 transitions. Word has length 72 [2020-10-12 19:36:59,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:36:59,365 INFO L479 AbstractCegarLoop]: Abstraction has 1131 states and 1619 transitions. [2020-10-12 19:36:59,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 19:36:59,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1619 transitions. [2020-10-12 19:36:59,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:36:59,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:36:59,367 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] [2020-10-12 19:36:59,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:36:59,367 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:36:59,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:36:59,367 INFO L82 PathProgramCache]: Analyzing trace with hash -197809817, now seen corresponding path program 1 times [2020-10-12 19:36:59,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:36:59,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544540658] [2020-10-12 19:36:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:36:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:59,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:00,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1380 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:37:00,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:00,912 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:37:00,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:00,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:00,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:00,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:00,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544540658] [2020-10-12 19:37:00,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:00,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:37:00,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421550131] [2020-10-12 19:37:00,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:37:00,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:00,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:37:00,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:37:00,930 INFO L87 Difference]: Start difference. First operand 1131 states and 1619 transitions. Second operand 7 states. [2020-10-12 19:37:01,081 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-10-12 19:37:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:37:04,073 INFO L93 Difference]: Finished difference Result 4762 states and 7244 transitions. [2020-10-12 19:37:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:37:04,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-10-12 19:37:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:37:04,077 INFO L225 Difference]: With dead ends: 4762 [2020-10-12 19:37:04,077 INFO L226 Difference]: Without dead ends: 4075 [2020-10-12 19:37:04,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:37:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2020-10-12 19:37:04,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 2072. [2020-10-12 19:37:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2072 states. [2020-10-12 19:37:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 3082 transitions. [2020-10-12 19:37:04,823 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 3082 transitions. Word has length 72 [2020-10-12 19:37:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:37:04,824 INFO L479 AbstractCegarLoop]: Abstraction has 2072 states and 3082 transitions. [2020-10-12 19:37:04,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:37:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 3082 transitions. [2020-10-12 19:37:04,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:37:04,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:37:04,826 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] [2020-10-12 19:37:04,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:37:04,826 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:37:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:37:04,827 INFO L82 PathProgramCache]: Analyzing trace with hash -767327522, now seen corresponding path program 1 times [2020-10-12 19:37:04,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:37:04,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764224379] [2020-10-12 19:37:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:37:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:04,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:07,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:09,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:09,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:37:09,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-12 19:37:09,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:37:09,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:37:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:37:09,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:37:09,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:10,109 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-12 19:37:10,287 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 29 [2020-10-12 19:37:10,518 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-12 19:37:10,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:37:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:37:10,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:37:10,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:37:10,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:37:10,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:37:10,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:37:10,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:37:10,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764224379] [2020-10-12 19:37:10,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:37:10,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:37:10,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459886163] [2020-10-12 19:37:10,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:37:10,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:37:10,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:37:10,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:37:10,557 INFO L87 Difference]: Start difference. First operand 2072 states and 3082 transitions. Second operand 14 states. [2020-10-12 19:37:10,750 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-12 19:37:11,262 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 19:37:11,586 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-12 19:37:11,949 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 19:37:12,155 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-12 19:37:12,359 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-12 19:37:12,716 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-12 19:37:13,168 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 19:37:13,644 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-12 19:37:13,885 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 19:37:14,172 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 19:37:16,816 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-12 19:37:17,309 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-12 19:37:17,579 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-12 19:37:18,879 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-12 19:37:20,079 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 19:37:20,904 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2020-10-12 19:37:22,024 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44