/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 11:25:59,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 11:25:59,349 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 11:25:59,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 11:25:59,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 11:25:59,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 11:25:59,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 11:25:59,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 11:25:59,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 11:25:59,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 11:25:59,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 11:25:59,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 11:25:59,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 11:25:59,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 11:25:59,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 11:25:59,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 11:25:59,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 11:25:59,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 11:25:59,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 11:25:59,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 11:25:59,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 11:25:59,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 11:25:59,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 11:25:59,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 11:25:59,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 11:25:59,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 11:25:59,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 11:25:59,412 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 11:25:59,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 11:25:59,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 11:25:59,414 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 11:25:59,415 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 11:25:59,416 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 11:25:59,417 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 11:25:59,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 11:25:59,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 11:25:59,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 11:25:59,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 11:25:59,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 11:25:59,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 11:25:59,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 11:25:59,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 11:25:59,473 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 11:25:59,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 11:25:59,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 11:25:59,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 11:25:59,475 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 11:25:59,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 11:25:59,476 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 11:25:59,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 11:25:59,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 11:25:59,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 11:25:59,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 11:25:59,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 11:25:59,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 11:25:59,478 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 11:25:59,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 11:25:59,478 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 11:25:59,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 11:25:59,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 11:25:59,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 11:25:59,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 11:25:59,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 11:25:59,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:25:59,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 11:25:59,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 11:25:59,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 11:25:59,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 11:25:59,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 11:25:59,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 11:25:59,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 11:25:59,483 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-09-25 11:25:59,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 11:25:59,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 11:25:59,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 11:25:59,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 11:25:59,984 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 11:25:59,986 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-25 11:26:00,080 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39e72c17/fd8602a5b93740478de2727a1f50f234/FLAGcbe2c5279 [2020-09-25 11:26:00,645 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 11:26:00,646 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/nested5-1.c [2020-09-25 11:26:00,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39e72c17/fd8602a5b93740478de2727a1f50f234/FLAGcbe2c5279 [2020-09-25 11:26:00,978 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a39e72c17/fd8602a5b93740478de2727a1f50f234 [2020-09-25 11:26:00,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 11:26:01,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 11:26:01,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 11:26:01,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 11:26:01,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 11:26:01,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:26:00" (1/1) ... [2020-09-25 11:26:01,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01, skipping insertion in model container [2020-09-25 11:26:01,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:26:00" (1/1) ... [2020-09-25 11:26:01,028 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 11:26:01,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 11:26:01,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:26:01,284 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 11:26:01,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 11:26:01,317 INFO L208 MainTranslator]: Completed translation [2020-09-25 11:26:01,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01 WrapperNode [2020-09-25 11:26:01,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 11:26:01,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 11:26:01,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 11:26:01,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 11:26:01,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... [2020-09-25 11:26:01,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 11:26:01,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 11:26:01,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 11:26:01,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 11:26:01,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 11:26:01,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 11:26:01,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 11:26:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 11:26:01,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 11:26:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 11:26:01,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 11:26:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 11:26:01,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 11:26:01,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 11:26:01,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 11:26:01,824 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-09-25 11:26:01,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:26:01 BoogieIcfgContainer [2020-09-25 11:26:01,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 11:26:01,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 11:26:01,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 11:26:01,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 11:26:01,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:26:00" (1/3) ... [2020-09-25 11:26:01,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348a2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:26:01, skipping insertion in model container [2020-09-25 11:26:01,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:26:01" (2/3) ... [2020-09-25 11:26:01,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1348a2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:26:01, skipping insertion in model container [2020-09-25 11:26:01,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:26:01" (3/3) ... [2020-09-25 11:26:01,843 INFO L109 eAbstractionObserver]: Analyzing ICFG nested5-1.c [2020-09-25 11:26:01,853 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 11:26:01,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 11:26:01,883 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 11:26:01,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 11:26:01,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 11:26:01,913 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 11:26:01,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 11:26:01,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 11:26:01,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 11:26:01,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 11:26:01,914 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 11:26:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-09-25 11:26:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-25 11:26:01,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:01,943 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] [2020-09-25 11:26:01,944 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1562147583, now seen corresponding path program 1 times [2020-09-25 11:26:01,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:01,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375835578] [2020-09-25 11:26:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:02,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:02,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:02,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-25 11:26:02,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-09-25 11:26:02,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:02,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 11:26:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:02,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 11:26:02,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-25 11:26:02,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:02,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:02,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:02,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:02,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:02,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:26:02,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:02,399 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:02,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:02,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:02,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:02,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375835578] [2020-09-25 11:26:02,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 11:26:02,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-25 11:26:02,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429793415] [2020-09-25 11:26:02,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-25 11:26:02,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:02,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-25 11:26:02,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:26:02,452 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2020-09-25 11:26:02,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:02,524 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2020-09-25 11:26:02,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-25 11:26:02,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-09-25 11:26:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:02,539 INFO L225 Difference]: With dead ends: 105 [2020-09-25 11:26:02,539 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 11:26:02,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-25 11:26:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 11:26:02,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2020-09-25 11:26:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 11:26:02,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-25 11:26:02,594 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 23 [2020-09-25 11:26:02,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:02,595 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-25 11:26:02,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-25 11:26:02,595 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-25 11:26:02,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 11:26:02,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:02,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:02,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 11:26:02,598 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:02,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:02,598 INFO L82 PathProgramCache]: Analyzing trace with hash 42061886, now seen corresponding path program 1 times [2020-09-25 11:26:02,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:02,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547302893] [2020-09-25 11:26:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:02,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:02,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:03,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:03,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 11:26:03,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:26:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-09-25 11:26:03,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:03,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:03,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 11:26:03,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:03,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-25 11:26:03,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 11:26:03,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:03,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:03,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:03,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:03,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:26:03,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:03,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:03,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:03,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:03,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547302893] [2020-09-25 11:26:03,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:03,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 11:26:03,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98400577] [2020-09-25 11:26:03,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 11:26:03,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 11:26:03,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 11:26:03,276 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 7 states. [2020-09-25 11:26:03,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:03,463 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2020-09-25 11:26:03,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 11:26:03,465 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-09-25 11:26:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:03,468 INFO L225 Difference]: With dead ends: 92 [2020-09-25 11:26:03,468 INFO L226 Difference]: Without dead ends: 90 [2020-09-25 11:26:03,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-09-25 11:26:03,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-25 11:26:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 51. [2020-09-25 11:26:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 11:26:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2020-09-25 11:26:03,496 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 27 [2020-09-25 11:26:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:03,496 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2020-09-25 11:26:03,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 11:26:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2020-09-25 11:26:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-25 11:26:03,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:03,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:03,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 11:26:03,503 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:03,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash -2023869189, now seen corresponding path program 2 times [2020-09-25 11:26:03,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:03,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961246050] [2020-09-25 11:26:03,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:03,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:03,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:03,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:03,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:03,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:04,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:04,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 11:26:04,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:26:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 491 [2020-09-25 11:26:04,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:04,028 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 11:26:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:04,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-25 11:26:04,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:04,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:04,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:04,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:04,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:04,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:04,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:26:04,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:04,178 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:04,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:04,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:04,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:04,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961246050] [2020-09-25 11:26:04,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:04,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 11:26:04,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029795631] [2020-09-25 11:26:04,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 11:26:04,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 11:26:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 11:26:04,186 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand 9 states. [2020-09-25 11:26:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:04,391 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-09-25 11:26:04,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:26:04,392 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-09-25 11:26:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:04,393 INFO L225 Difference]: With dead ends: 135 [2020-09-25 11:26:04,393 INFO L226 Difference]: Without dead ends: 94 [2020-09-25 11:26:04,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-09-25 11:26:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-25 11:26:04,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2020-09-25 11:26:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-25 11:26:04,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2020-09-25 11:26:04,407 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 31 [2020-09-25 11:26:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:04,408 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2020-09-25 11:26:04,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 11:26:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2020-09-25 11:26:04,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 11:26:04,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:04,410 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:04,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 11:26:04,411 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash -909118664, now seen corresponding path program 3 times [2020-09-25 11:26:04,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:04,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885583035] [2020-09-25 11:26:04,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:04,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:04,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:05,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 11:26:05,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:26:05,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 922 [2020-09-25 11:26:05,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:05,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:26:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:05,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 11:26:05,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:05,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:05,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:05,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:05,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:05,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 11:26:05,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:05,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:05,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:05,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:05,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:05,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:05,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885583035] [2020-09-25 11:26:05,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:05,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:26:05,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401915484] [2020-09-25 11:26:05,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:26:05,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:26:05,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:26:05,604 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand 11 states. [2020-09-25 11:26:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:05,869 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2020-09-25 11:26:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 11:26:05,870 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2020-09-25 11:26:05,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:05,871 INFO L225 Difference]: With dead ends: 118 [2020-09-25 11:26:05,872 INFO L226 Difference]: Without dead ends: 73 [2020-09-25 11:26:05,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:26:05,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-25 11:26:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-25 11:26:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 11:26:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-09-25 11:26:05,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 35 [2020-09-25 11:26:05,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:05,890 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-09-25 11:26:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:26:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-09-25 11:26:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-25 11:26:05,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:05,891 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:05,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 11:26:05,892 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -460436747, now seen corresponding path program 4 times [2020-09-25 11:26:05,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:05,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192974928] [2020-09-25 11:26:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:05,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:06,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:06,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:06,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:06,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-25 11:26:06,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:26:06,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-09-25 11:26:06,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:06,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 11:26:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:06,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 11:26:06,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:07,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:07,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:07,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:07,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:07,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:26:07,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:07,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:07,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192974928] [2020-09-25 11:26:07,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:07,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 11:26:07,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214066640] [2020-09-25 11:26:07,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 11:26:07,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 11:26:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-25 11:26:07,072 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 11 states. [2020-09-25 11:26:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:07,348 INFO L93 Difference]: Finished difference Result 121 states and 133 transitions. [2020-09-25 11:26:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 11:26:07,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-09-25 11:26:07,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:07,349 INFO L225 Difference]: With dead ends: 121 [2020-09-25 11:26:07,350 INFO L226 Difference]: Without dead ends: 77 [2020-09-25 11:26:07,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:26:07,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-25 11:26:07,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2020-09-25 11:26:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-25 11:26:07,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2020-09-25 11:26:07,357 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 39 [2020-09-25 11:26:07,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:07,358 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2020-09-25 11:26:07,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 11:26:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2020-09-25 11:26:07,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-25 11:26:07,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:07,360 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:07,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 11:26:07,360 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:07,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1152416818, now seen corresponding path program 5 times [2020-09-25 11:26:07,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:07,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424225630] [2020-09-25 11:26:07,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:07,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:07,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:07,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:09,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:09,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-25 11:26:09,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:26:09,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1641 [2020-09-25 11:26:09,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:09,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 11:26:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 11:26:09,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:09,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:09,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:09,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:09,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 11:26:09,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:09,299 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:09,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:09,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 11:26:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:09,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424225630] [2020-09-25 11:26:09,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:09,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 11:26:09,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411204274] [2020-09-25 11:26:09,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 11:26:09,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:09,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 11:26:09,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-25 11:26:09,314 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 13 states. [2020-09-25 11:26:09,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:09,740 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2020-09-25 11:26:09,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 11:26:09,741 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-09-25 11:26:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:09,742 INFO L225 Difference]: With dead ends: 129 [2020-09-25 11:26:09,742 INFO L226 Difference]: Without dead ends: 81 [2020-09-25 11:26:09,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-25 11:26:09,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-25 11:26:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-25 11:26:09,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-25 11:26:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-09-25 11:26:09,754 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 43 [2020-09-25 11:26:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:09,754 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-09-25 11:26:09,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 11:26:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-09-25 11:26:09,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 11:26:09,756 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:09,756 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:09,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 11:26:09,757 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:09,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:09,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2041431791, now seen corresponding path program 6 times [2020-09-25 11:26:09,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:09,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355962705] [2020-09-25 11:26:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:09,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:09,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:10,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:11,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-25 11:26:11,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:26:11,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1842 [2020-09-25 11:26:11,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:11,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 11:26:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:11,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 11:26:11,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:11,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:11,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:11,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:11,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:11,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:11,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:11,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:11,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:11,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:11,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:11,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:11,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355962705] [2020-09-25 11:26:11,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:11,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 11:26:11,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265903333] [2020-09-25 11:26:11,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 11:26:11,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:11,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 11:26:11,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-25 11:26:11,886 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 15 states. [2020-09-25 11:26:12,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:12,375 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2020-09-25 11:26:12,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-25 11:26:12,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-09-25 11:26:12,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:12,377 INFO L225 Difference]: With dead ends: 137 [2020-09-25 11:26:12,377 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 11:26:12,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-09-25 11:26:12,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 11:26:12,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-09-25 11:26:12,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 11:26:12,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-09-25 11:26:12,385 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 47 [2020-09-25 11:26:12,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:12,385 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-09-25 11:26:12,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 11:26:12,385 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-09-25 11:26:12,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 11:26:12,386 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:12,387 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:12,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 11:26:12,387 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:12,388 INFO L82 PathProgramCache]: Analyzing trace with hash 90008364, now seen corresponding path program 7 times [2020-09-25 11:26:12,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:12,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156675325] [2020-09-25 11:26:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:12,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:12,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:13,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:14,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:14,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 11:26:14,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-25 11:26:14,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1701 [2020-09-25 11:26:14,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:14,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 11:26:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:14,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 11:26:14,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:14,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:14,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:14,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:14,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:14,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:14,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:14,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:14,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:14,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:14,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:14,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:14,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:14,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:14,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156675325] [2020-09-25 11:26:14,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:14,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 11:26:14,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941227864] [2020-09-25 11:26:14,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 11:26:14,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:14,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 11:26:14,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-25 11:26:14,470 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 17 states. [2020-09-25 11:26:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:15,085 INFO L93 Difference]: Finished difference Result 145 states and 157 transitions. [2020-09-25 11:26:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-25 11:26:15,087 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-09-25 11:26:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:15,088 INFO L225 Difference]: With dead ends: 145 [2020-09-25 11:26:15,088 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 11:26:15,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-09-25 11:26:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 11:26:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2020-09-25 11:26:15,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 11:26:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-09-25 11:26:15,095 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 51 [2020-09-25 11:26:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:15,096 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-09-25 11:26:15,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 11:26:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-09-25 11:26:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 11:26:15,098 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:15,099 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:15,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 11:26:15,099 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:15,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:15,099 INFO L82 PathProgramCache]: Analyzing trace with hash 737585385, now seen corresponding path program 8 times [2020-09-25 11:26:15,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:15,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090174826] [2020-09-25 11:26:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:15,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:16,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:16,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 11:26:16,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 11:26:16,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1631 [2020-09-25 11:26:16,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:16,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 11:26:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-25 11:26:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:17,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:17,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:17,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:17,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:17,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 11:26:17,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:17,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:17,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:17,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:17,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090174826] [2020-09-25 11:26:17,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:17,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-25 11:26:17,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129169373] [2020-09-25 11:26:17,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-25 11:26:17,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-25 11:26:17,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-09-25 11:26:17,105 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 19 states. [2020-09-25 11:26:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:17,760 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2020-09-25 11:26:17,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-25 11:26:17,761 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-09-25 11:26:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:17,762 INFO L225 Difference]: With dead ends: 153 [2020-09-25 11:26:17,762 INFO L226 Difference]: Without dead ends: 93 [2020-09-25 11:26:17,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-09-25 11:26:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-25 11:26:17,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-25 11:26:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-25 11:26:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2020-09-25 11:26:17,779 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 55 [2020-09-25 11:26:17,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:17,779 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2020-09-25 11:26:17,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-25 11:26:17,780 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2020-09-25 11:26:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-25 11:26:17,780 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:17,780 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:17,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 11:26:17,783 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:17,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:17,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1005535194, now seen corresponding path program 9 times [2020-09-25 11:26:17,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:17,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869377391] [2020-09-25 11:26:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:17,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:17,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:18,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:19,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:19,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:20,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:20,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:20,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-25 11:26:20,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 11:26:20,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2571 [2020-09-25 11:26:20,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:20,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-25 11:26:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-09-25 11:26:20,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-25 11:26:20,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:20,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:20,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:20,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:20,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:20,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:20,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:20,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:20,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:20,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:20,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:20,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 11:26:20,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869377391] [2020-09-25 11:26:20,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:20,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-25 11:26:20,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949274887] [2020-09-25 11:26:20,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-25 11:26:20,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-25 11:26:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-25 11:26:20,763 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand 21 states. [2020-09-25 11:26:21,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 11:26:21,786 INFO L93 Difference]: Finished difference Result 161 states and 173 transitions. [2020-09-25 11:26:21,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-25 11:26:21,787 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-09-25 11:26:21,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 11:26:21,788 INFO L225 Difference]: With dead ends: 161 [2020-09-25 11:26:21,788 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 11:26:21,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-09-25 11:26:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 11:26:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2020-09-25 11:26:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 11:26:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-09-25 11:26:21,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 59 [2020-09-25 11:26:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 11:26:21,795 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-09-25 11:26:21,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-25 11:26:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-09-25 11:26:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-25 11:26:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 11:26:21,796 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 11:26:21,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 11:26:21,796 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 11:26:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 11:26:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 111341795, now seen corresponding path program 10 times [2020-09-25 11:26:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 11:26:21,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245502342] [2020-09-25 11:26:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 11:26:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:21,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:22,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:22,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:23,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:23,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:23,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:24,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:24,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:24,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 11:26:24,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 11:26:24,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2590 [2020-09-25 11:26:24,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:24,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:24,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-25 11:26:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-09-25 11:26:24,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-25 11:26:24,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 11:26:45,559 WARN L193 SmtUtils]: Spent 5.19 s on a formula simplification. DAG size of input: 118 DAG size of output: 13 [2020-09-25 11:26:45,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 11:26:45,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 11:26:45,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 11:26:45,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 11:26:45,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 11:26:45,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 11:26:45,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 11:26:45,718 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 45 proven. 140 refuted. 4 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 11:26:45,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245502342] [2020-09-25 11:26:45,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 11:26:45,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-25 11:26:45,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205625052] [2020-09-25 11:26:45,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-25 11:26:45,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 11:26:45,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-25 11:26:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=501, Unknown=6, NotChecked=0, Total=552 [2020-09-25 11:26:45,721 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 24 states. [2020-09-25 11:26:47,903 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-09-25 11:26:50,698 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-25 11:26:52,542 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-09-25 11:26:56,540 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-09-25 11:27:00,152 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-09-25 11:27:01,362 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 45