/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:09:58,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:09:58,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:09:58,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:09:58,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:09:58,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:09:58,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:09:58,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:09:58,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:09:58,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:09:58,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:09:58,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:09:58,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:09:58,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:09:58,621 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:09:58,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:09:58,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:09:58,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:09:58,627 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:09:58,629 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:09:58,631 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:09:58,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:09:58,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:09:58,634 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:09:58,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:09:58,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:09:58,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:09:58,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:09:58,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:09:58,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:09:58,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:09:58,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:09:58,652 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:09:58,653 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:09:58,655 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:09:58,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:09:58,656 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:09:58,657 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:09:58,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:09:58,658 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:09:58,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:09:58,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:09:58,713 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:09:58,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:09:58,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:09:58,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:09:58,718 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:09:58,718 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:09:58,719 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:09:58,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:09:58,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:09:58,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:09:58,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:09:58,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:09:58,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:09:58,721 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:09:58,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:09:58,722 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:09:58,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:09:58,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:09:58,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:09:58,723 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:09:58,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:09:58,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:09:58,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:09:58,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:09:58,724 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:09:58,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:09:58,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:09:58,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:09:58,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:09:58,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:09:59,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:09:59,185 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:09:59,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:09:59,190 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:09:59,191 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:09:59,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2020-10-26 19:09:59,276 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef91f08e5/a2e25190a1724ad6a86c2749226a157e/FLAG531a8dbfe [2020-10-26 19:09:59,928 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:09:59,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_m5.c [2020-10-26 19:09:59,938 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef91f08e5/a2e25190a1724ad6a86c2749226a157e/FLAG531a8dbfe [2020-10-26 19:10:00,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ef91f08e5/a2e25190a1724ad6a86c2749226a157e [2020-10-26 19:10:00,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:10:00,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:10:00,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:10:00,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:10:00,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:10:00,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b223a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00, skipping insertion in model container [2020-10-26 19:10:00,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:10:00,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:10:00,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:10:00,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:10:00,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:10:00,553 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:10:00,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00 WrapperNode [2020-10-26 19:10:00,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:10:00,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:10:00,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:10:00,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:10:00,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,579 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... [2020-10-26 19:10:00,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:10:00,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:10:00,605 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:10:00,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:10:00,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:10:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:10:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:10:00,683 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:10:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:10:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:10:00,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:10:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:10:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:10:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:10:00,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:10:00,685 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:10:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:10:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:10:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:10:00,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:10:01,136 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:10:01,136 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-26 19:10:01,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:10:01 BoogieIcfgContainer [2020-10-26 19:10:01,138 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:10:01,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:10:01,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:10:01,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:10:01,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:10:00" (1/3) ... [2020-10-26 19:10:01,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd3f9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:10:01, skipping insertion in model container [2020-10-26 19:10:01,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:10:00" (2/3) ... [2020-10-26 19:10:01,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cd3f9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:10:01, skipping insertion in model container [2020-10-26 19:10:01,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:10:01" (3/3) ... [2020-10-26 19:10:01,148 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2020-10-26 19:10:01,160 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:10:01,165 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:10:01,179 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:10:01,208 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:10:01,208 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:10:01,208 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:10:01,208 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:10:01,208 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:10:01,209 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:10:01,209 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:10:01,209 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:10:01,228 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-26 19:10:01,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:10:01,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:01,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:01,237 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:01,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1682014752, now seen corresponding path program 1 times [2020-10-26 19:10:01,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:01,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952814285] [2020-10-26 19:10:01,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:01,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:02,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:03,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:06,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:06,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:10:06,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-26 19:10:06,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:10:06,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:06,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:10:06,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:06,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:10:06,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:10:06,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:06,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:06,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:06,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:06,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:06,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:10:06,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:06,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:06,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:06,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:06,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952814285] [2020-10-26 19:10:06,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:06,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:10:06,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576430806] [2020-10-26 19:10:06,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:10:06,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:06,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:10:06,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:06,590 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 5 states. [2020-10-26 19:10:07,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:07,044 INFO L93 Difference]: Finished difference Result 125 states and 189 transitions. [2020-10-26 19:10:07,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:10:07,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-26 19:10:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:07,068 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:10:07,068 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:10:07,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:10:07,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:10:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2020-10-26 19:10:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:10:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-26 19:10:07,148 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 33 [2020-10-26 19:10:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:07,148 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-26 19:10:07,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:10:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-26 19:10:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:10:07,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:07,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:07,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:10:07,153 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 419710214, now seen corresponding path program 1 times [2020-10-26 19:10:07,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:07,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058321235] [2020-10-26 19:10:07,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:07,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:07,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:09,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:12,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:10:12,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:10:12,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:10:12,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:10:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:12,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:10:12,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:12,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:12,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:12,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:12,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:12,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:12,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:12,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:12,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:12,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:12,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-26 19:10:12,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058321235] [2020-10-26 19:10:12,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:12,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:10:12,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120780247] [2020-10-26 19:10:12,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:10:12,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:12,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:10:12,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:10:12,302 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 6 states. [2020-10-26 19:10:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:12,591 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2020-10-26 19:10:12,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:10:12,592 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 53 [2020-10-26 19:10:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:12,593 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:10:12,594 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:10:12,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:10:12,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:10:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-26 19:10:12,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:10:12,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-26 19:10:12,609 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 53 [2020-10-26 19:10:12,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:12,609 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-26 19:10:12,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:10:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-26 19:10:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:10:12,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:12,613 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:12,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:10:12,613 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:12,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:12,614 INFO L82 PathProgramCache]: Analyzing trace with hash -408227750, now seen corresponding path program 2 times [2020-10-26 19:10:12,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:12,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43429197] [2020-10-26 19:10:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:12,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:12,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:14,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:16,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:17,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:17,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:10:17,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:10:17,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5356 [2020-10-26 19:10:17,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-26 19:10:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:17,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:10:17,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:20,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:20,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:20,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:20,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:20,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:20,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:10:20,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:20,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:20,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43429197] [2020-10-26 19:10:20,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:20,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:10:20,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626156225] [2020-10-26 19:10:20,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:10:20,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:20,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:10:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1547, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:10:20,320 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 41 states. [2020-10-26 19:10:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:22,742 INFO L93 Difference]: Finished difference Result 141 states and 160 transitions. [2020-10-26 19:10:22,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:10:22,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 73 [2020-10-26 19:10:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:22,744 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:10:22,744 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:10:22,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:10:22,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:10:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 128. [2020-10-26 19:10:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:10:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2020-10-26 19:10:22,783 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 73 [2020-10-26 19:10:22,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:22,784 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2020-10-26 19:10:22,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:10:22,784 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2020-10-26 19:10:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:10:22,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:22,786 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:22,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:10:22,789 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:22,790 INFO L82 PathProgramCache]: Analyzing trace with hash -465093092, now seen corresponding path program 3 times [2020-10-26 19:10:22,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:22,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538341630] [2020-10-26 19:10:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:22,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:22,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:22,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:22,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:23,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:25,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:27,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:27,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:10:27,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:10:27,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:10:27,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:27,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:10:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:27,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:10:27,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:27,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:27,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:27,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:27,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:27,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:27,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:27,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:10:27,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538341630] [2020-10-26 19:10:27,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:10:27,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:10:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658675802] [2020-10-26 19:10:27,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:10:27,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:27,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:10:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:10:27,903 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand 4 states. [2020-10-26 19:10:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:28,024 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2020-10-26 19:10:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:10:28,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-26 19:10:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:28,026 INFO L225 Difference]: With dead ends: 249 [2020-10-26 19:10:28,026 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:10:28,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:10:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:10:28,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-26 19:10:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-26 19:10:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-10-26 19:10:28,057 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 75 [2020-10-26 19:10:28,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:28,057 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-10-26 19:10:28,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:10:28,058 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-10-26 19:10:28,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:10:28,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:28,063 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:28,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:10:28,063 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:28,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:28,063 INFO L82 PathProgramCache]: Analyzing trace with hash -269399394, now seen corresponding path program 1 times [2020-10-26 19:10:28,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:28,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354347048] [2020-10-26 19:10:28,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:28,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:28,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:28,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:30,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:33,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:10:33,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:10:33,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:10:33,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:10:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:33,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:10:33,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:33,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:33,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:33,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:33,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:33,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:33,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:33,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:33,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-26 19:10:33,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354347048] [2020-10-26 19:10:33,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:33,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:10:33,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605163555] [2020-10-26 19:10:33,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:10:33,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:10:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:33,224 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 5 states. [2020-10-26 19:10:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:33,354 INFO L93 Difference]: Finished difference Result 250 states and 288 transitions. [2020-10-26 19:10:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:10:33,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-26 19:10:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:33,356 INFO L225 Difference]: With dead ends: 250 [2020-10-26 19:10:33,356 INFO L226 Difference]: Without dead ends: 131 [2020-10-26 19:10:33,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:10:33,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-26 19:10:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-26 19:10:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-26 19:10:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2020-10-26 19:10:33,373 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 77 [2020-10-26 19:10:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:33,374 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2020-10-26 19:10:33,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:10:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2020-10-26 19:10:33,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:10:33,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:33,376 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:33,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:10:33,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1186316640, now seen corresponding path program 2 times [2020-10-26 19:10:33,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:33,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11494270] [2020-10-26 19:10:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:33,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:33,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:34,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:38,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:38,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:10:38,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:10:38,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:10:38,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:38,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:38,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:10:38,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:38,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:38,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:38,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:38,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:38,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:38,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:10:38,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:38,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:38,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-26 19:10:38,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11494270] [2020-10-26 19:10:38,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:38,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:38,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888850621] [2020-10-26 19:10:38,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:38,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:38,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:38,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:38,537 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand 10 states. [2020-10-26 19:10:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:39,027 INFO L93 Difference]: Finished difference Result 256 states and 294 transitions. [2020-10-26 19:10:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:10:39,028 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-26 19:10:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:39,029 INFO L225 Difference]: With dead ends: 256 [2020-10-26 19:10:39,029 INFO L226 Difference]: Without dead ends: 134 [2020-10-26 19:10:39,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:10:39,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-26 19:10:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-26 19:10:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-26 19:10:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 152 transitions. [2020-10-26 19:10:39,045 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 152 transitions. Word has length 79 [2020-10-26 19:10:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:39,045 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 152 transitions. [2020-10-26 19:10:39,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 152 transitions. [2020-10-26 19:10:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:10:39,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:39,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:39,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:10:39,051 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:39,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:39,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1875494366, now seen corresponding path program 3 times [2020-10-26 19:10:39,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:39,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73940081] [2020-10-26 19:10:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:39,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:44,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:44,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:10:44,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:10:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:10:44,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:10:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:10:44,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:44,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:44,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:44,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:44,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:44,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:44,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-26 19:10:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73940081] [2020-10-26 19:10:44,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:44,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:10:44,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108331398] [2020-10-26 19:10:44,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:10:44,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:44,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:10:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:10:44,192 INFO L87 Difference]: Start difference. First operand 133 states and 152 transitions. Second operand 10 states. [2020-10-26 19:10:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:10:44,627 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2020-10-26 19:10:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:10:44,628 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 81 [2020-10-26 19:10:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:10:44,629 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:10:44,629 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:10:44,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:10:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:10:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-26 19:10:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-26 19:10:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2020-10-26 19:10:44,656 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 81 [2020-10-26 19:10:44,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:10:44,657 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2020-10-26 19:10:44,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:10:44,657 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2020-10-26 19:10:44,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:10:44,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:10:44,658 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:10:44,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:10:44,659 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:10:44,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:10:44,659 INFO L82 PathProgramCache]: Analyzing trace with hash 997736500, now seen corresponding path program 4 times [2020-10-26 19:10:44,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:10:44,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159099957] [2020-10-26 19:10:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:10:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:44,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:46,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:47,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-26 19:10:49,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:10:49,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 19:10:49,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:56,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:56,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:56,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:56,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:56,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:56,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:56,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:10:56,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159099957] [2020-10-26 19:10:56,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:56,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-26 19:10:56,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302490828] [2020-10-26 19:10:56,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-26 19:10:56,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:56,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-26 19:10:56,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=4672, Unknown=0, NotChecked=0, Total=4970 [2020-10-26 19:10:56,693 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand 71 states. [2020-10-26 19:10:59,152 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-26 19:10:59,659 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-26 19:11:01,213 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2020-10-26 19:11:02,184 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-26 19:11:02,973 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2020-10-26 19:11:04,112 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-26 19:11:04,386 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-26 19:11:08,795 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-10-26 19:11:11,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:11,037 INFO L93 Difference]: Finished difference Result 282 states and 315 transitions. [2020-10-26 19:11:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-26 19:11:11,038 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 99 [2020-10-26 19:11:11,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:11,041 INFO L225 Difference]: With dead ends: 282 [2020-10-26 19:11:11,041 INFO L226 Difference]: Without dead ends: 276 [2020-10-26 19:11:11,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3582 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=750, Invalid=13292, Unknown=0, NotChecked=0, Total=14042 [2020-10-26 19:11:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-26 19:11:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 187. [2020-10-26 19:11:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-26 19:11:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 209 transitions. [2020-10-26 19:11:11,071 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 209 transitions. Word has length 99 [2020-10-26 19:11:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:11,071 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 209 transitions. [2020-10-26 19:11:11,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-26 19:11:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 209 transitions. [2020-10-26 19:11:11,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:11:11,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:11,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:11,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:11:11,073 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:11,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:11,074 INFO L82 PathProgramCache]: Analyzing trace with hash -936525962, now seen corresponding path program 5 times [2020-10-26 19:11:11,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:11,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799738045] [2020-10-26 19:11:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:11,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:11,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:11,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:11,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:12,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:16,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:11:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:16,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:11:16,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:16,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:16,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:16,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:16,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:16,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:16,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:16,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:16,241 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:11:16,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799738045] [2020-10-26 19:11:16,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:16,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:11:16,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950338654] [2020-10-26 19:11:16,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:11:16,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:16,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:11:16,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:11:16,247 INFO L87 Difference]: Start difference. First operand 187 states and 209 transitions. Second operand 12 states. [2020-10-26 19:11:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:17,062 INFO L93 Difference]: Finished difference Result 294 states and 328 transitions. [2020-10-26 19:11:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:11:17,063 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-26 19:11:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:17,064 INFO L225 Difference]: With dead ends: 294 [2020-10-26 19:11:17,064 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:11:17,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:11:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:11:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-26 19:11:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:11:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2020-10-26 19:11:17,078 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 101 [2020-10-26 19:11:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:17,078 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2020-10-26 19:11:17,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:11:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2020-10-26 19:11:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:11:17,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:17,080 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:17,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:11:17,080 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -851089738, now seen corresponding path program 6 times [2020-10-26 19:11:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:17,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022772466] [2020-10-26 19:11:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:17,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:20,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:22,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:22,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:11:22,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:11:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:11:22,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:11:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:22,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:11:22,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:22,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:22,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:22,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:22,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:22,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:22,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:22,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-26 19:11:22,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022772466] [2020-10-26 19:11:22,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:22,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:11:22,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232817840] [2020-10-26 19:11:22,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:11:22,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:22,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:11:22,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:11:22,248 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand 12 states. [2020-10-26 19:11:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:11:22,827 INFO L93 Difference]: Finished difference Result 200 states and 228 transitions. [2020-10-26 19:11:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:11:22,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 101 [2020-10-26 19:11:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:11:22,829 INFO L225 Difference]: With dead ends: 200 [2020-10-26 19:11:22,829 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:11:22,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:11:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:11:22,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-10-26 19:11:22,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:11:22,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 132 transitions. [2020-10-26 19:11:22,842 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 132 transitions. Word has length 101 [2020-10-26 19:11:22,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:11:22,843 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 132 transitions. [2020-10-26 19:11:22,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:11:22,843 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 132 transitions. [2020-10-26 19:11:22,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:11:22,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:11:22,844 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:11:22,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:11:22,844 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:11:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:11:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -251856374, now seen corresponding path program 7 times [2020-10-26 19:11:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:11:22,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834560455] [2020-10-26 19:11:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:11:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:23,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:28,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:28,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:11:28,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:11:28,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-26 19:11:28,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-26 19:11:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:11:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-26 19:11:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:32,304 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-26 19:11:32,596 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56 [2020-10-26 19:11:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:11:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:11:44,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:11:44,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:11:44,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:11:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:11:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:11:44,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834560455] [2020-10-26 19:11:44,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:11:44,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-10-26 19:11:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679186424] [2020-10-26 19:11:44,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-26 19:11:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:11:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-26 19:11:44,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=8305, Unknown=0, NotChecked=0, Total=8556 [2020-10-26 19:11:44,675 INFO L87 Difference]: Start difference. First operand 122 states and 132 transitions. Second operand 93 states. [2020-10-26 19:11:46,613 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-26 19:11:48,373 WARN L193 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 112 [2020-10-26 19:11:49,075 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 95 [2020-10-26 19:11:50,126 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 121 [2020-10-26 19:11:50,911 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-10-26 19:11:51,390 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 31 [2020-10-26 19:11:52,021 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-26 19:11:52,520 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 32 [2020-10-26 19:11:53,617 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 110 [2020-10-26 19:11:54,076 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-26 19:11:54,609 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 83 [2020-10-26 19:11:55,080 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 31 [2020-10-26 19:11:55,677 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 45 [2020-10-26 19:11:56,035 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-26 19:11:56,548 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 34 [2020-10-26 19:11:57,188 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 56 [2020-10-26 19:11:57,527 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2020-10-26 19:11:58,580 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 54 [2020-10-26 19:11:59,032 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 34 [2020-10-26 19:11:59,643 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 57 [2020-10-26 19:12:00,231 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2020-10-26 19:12:00,668 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 38 [2020-10-26 19:12:01,187 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 42 [2020-10-26 19:12:02,190 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 117 [2020-10-26 19:12:02,762 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 55 [2020-10-26 19:12:03,594 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 100 [2020-10-26 19:12:04,184 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 59 [2020-10-26 19:12:05,356 WARN L193 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 126 [2020-10-26 19:12:06,122 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 105 [2020-10-26 19:12:07,204 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 104 [2020-10-26 19:12:07,767 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 38 [2020-10-26 19:12:08,716 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 88 [2020-10-26 19:12:09,300 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 35 [2020-10-26 19:12:10,270 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 96 [2020-10-26 19:12:10,822 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 34 [2020-10-26 19:12:11,901 WARN L193 SmtUtils]: Spent 540.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 116 [2020-10-26 19:12:12,488 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 36 [2020-10-26 19:12:13,450 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 104 [2020-10-26 19:12:13,948 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 34 [2020-10-26 19:12:14,897 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 102 [2020-10-26 19:12:15,428 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 36 [2020-10-26 19:12:16,218 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-10-26 19:12:16,711 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 33 [2020-10-26 19:12:17,397 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 87 [2020-10-26 19:12:18,557 WARN L193 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 113 [2020-10-26 19:12:19,067 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-26 19:12:19,989 WARN L193 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 96 [2020-10-26 19:12:21,031 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 102 [2020-10-26 19:12:22,402 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 122 [2020-10-26 19:12:23,510 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-10-26 19:12:24,164 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 51 [2020-10-26 19:12:24,957 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-26 19:12:26,619 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 118 [2020-10-26 19:12:27,504 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-26 19:12:29,038 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-10-26 19:12:29,692 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-10-26 19:12:30,853 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 105 [2020-10-26 19:12:31,276 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-26 19:12:32,264 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2020-10-26 19:12:33,750 WARN L193 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 120 [2020-10-26 19:12:34,495 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-10-26 19:12:35,085 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 41 [2020-10-26 19:12:35,777 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-10-26 19:12:37,442 WARN L193 SmtUtils]: Spent 997.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 125 [2020-10-26 19:12:38,938 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 121 [2020-10-26 19:12:39,775 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 50 [2020-10-26 19:12:41,707 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 122 [2020-10-26 19:12:43,488 WARN L193 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 109 [2020-10-26 19:12:45,053 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 104 [2020-10-26 19:12:50,574 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 46 [2020-10-26 19:12:52,175 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 52 [2020-10-26 19:12:53,292 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 43 [2020-10-26 19:12:54,234 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 40 [2020-10-26 19:12:55,089 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 48 [2020-10-26 19:12:56,080 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 47 [2020-10-26 19:12:56,784 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-26 19:12:58,091 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 97 [2020-10-26 19:12:59,925 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 93 [2020-10-26 19:13:01,277 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 91 [2020-10-26 19:13:02,577 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2020-10-26 19:13:03,677 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2020-10-26 19:13:04,303 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 37 [2020-10-26 19:13:07,062 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2020-10-26 19:13:08,580 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-26 19:13:10,373 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 88 [2020-10-26 19:13:11,722 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 36 [2020-10-26 19:13:13,094 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2020-10-26 19:13:14,632 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-26 19:13:16,334 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-26 19:13:18,619 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-10-26 19:13:20,839 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2020-10-26 19:13:22,977 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 32 [2020-10-26 19:13:24,873 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2020-10-26 19:13:26,438 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-26 19:13:28,418 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-26 19:13:30,267 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-26 19:13:31,900 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-26 19:13:33,291 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-26 19:13:34,547 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2020-10-26 19:13:36,412 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 86 [2020-10-26 19:13:38,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:38,884 INFO L93 Difference]: Finished difference Result 408 states and 469 transitions. [2020-10-26 19:13:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-26 19:13:38,888 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 121 [2020-10-26 19:13:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:38,893 INFO L225 Difference]: With dead ends: 408 [2020-10-26 19:13:38,893 INFO L226 Difference]: Without dead ends: 401 [2020-10-26 19:13:38,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8312 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=2543, Invalid=39687, Unknown=0, NotChecked=0, Total=42230 [2020-10-26 19:13:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-10-26 19:13:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 344. [2020-10-26 19:13:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-26 19:13:38,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 394 transitions. [2020-10-26 19:13:38,950 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 394 transitions. Word has length 121 [2020-10-26 19:13:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:38,951 INFO L481 AbstractCegarLoop]: Abstraction has 344 states and 394 transitions. [2020-10-26 19:13:38,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-26 19:13:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 394 transitions. [2020-10-26 19:13:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:13:38,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:38,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:38,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:13:38,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1083468404, now seen corresponding path program 8 times [2020-10-26 19:13:38,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:38,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746081508] [2020-10-26 19:13:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:38,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:39,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:40,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:43,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:13:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:13:43,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-26 19:13:43,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:13:44,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:44,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:44,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:13:44,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:13:44,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:13:44,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:13:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 19:13:44,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746081508] [2020-10-26 19:13:44,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:13:44,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:13:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711334688] [2020-10-26 19:13:44,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:13:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:13:44,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:13:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:13:44,371 INFO L87 Difference]: Start difference. First operand 344 states and 394 transitions. Second operand 14 states. [2020-10-26 19:13:46,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:13:46,182 INFO L93 Difference]: Finished difference Result 452 states and 511 transitions. [2020-10-26 19:13:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:13:46,185 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 123 [2020-10-26 19:13:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:13:46,187 INFO L225 Difference]: With dead ends: 452 [2020-10-26 19:13:46,187 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:13:46,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:13:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:13:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-10-26 19:13:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-26 19:13:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2020-10-26 19:13:46,201 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 123 [2020-10-26 19:13:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:13:46,201 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2020-10-26 19:13:46,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:13:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2020-10-26 19:13:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:13:46,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:13:46,202 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:13:46,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:13:46,202 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:13:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:13:46,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2064026868, now seen corresponding path program 9 times [2020-10-26 19:13:46,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:13:46,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446289241] [2020-10-26 19:13:46,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:13:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:13:46,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:13:46,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking...