/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-industry-pattern/array_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:44:00,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:44:00,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:44:00,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:44:00,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:44:00,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:44:00,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:44:00,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:44:00,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:44:00,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:44:00,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:44:00,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:44:00,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:44:00,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:44:00,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:44:00,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:44:00,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:44:00,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:44:00,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:44:00,616 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:44:00,618 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:44:00,619 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:44:00,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:44:00,622 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:44:00,634 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:44:00,635 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:44:00,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:44:00,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:44:00,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:44:00,638 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:44:00,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:44:00,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:44:00,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:44:00,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:44:00,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:44:00,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:44:00,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:44:00,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:44:00,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:44:00,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:44:00,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:44:00,647 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 19:44:00,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:44:00,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:44:00,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:44:00,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:44:00,677 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:44:00,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:44:00,678 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:44:00,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:44:00,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:44:00,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:44:00,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:44:00,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:44:00,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:44:00,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:44:00,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:44:00,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:44:00,680 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:44:00,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:44:00,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:44:00,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:44:00,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:44:00,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:44:00,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:44:00,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:44:00,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:44:00,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:44:00,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:44:00,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:44:00,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:44:00,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:44:01,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:44:01,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:44:01,096 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:44:01,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:44:01,099 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:44:01,100 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-26 19:44:01,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1efb2980a/a1fb9af24fb9429ea2eecfa00d162fc3/FLAG3bfd469f0 [2020-10-26 19:44:01,812 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:44:01,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_monotonic.i [2020-10-26 19:44:01,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1efb2980a/a1fb9af24fb9429ea2eecfa00d162fc3/FLAG3bfd469f0 [2020-10-26 19:44:02,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1efb2980a/a1fb9af24fb9429ea2eecfa00d162fc3 [2020-10-26 19:44:02,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:44:02,174 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:44:02,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:44:02,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:44:02,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:44:02,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6629ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02, skipping insertion in model container [2020-10-26 19:44:02,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:44:02,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:44:02,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:44:02,391 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:44:02,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:44:02,428 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:44:02,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02 WrapperNode [2020-10-26 19:44:02,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:44:02,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:44:02,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:44:02,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:44:02,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (1/1) ... [2020-10-26 19:44:02,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:44:02,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:44:02,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:44:02,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:44:02,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (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 19:44:02,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:44:02,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:44:02,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:44:02,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:44:02,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:44:02,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:44:02,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:44:02,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:44:02,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:44:02,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:44:02,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:44:02,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:44:02,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:44:02,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:44:02,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:44:03,053 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:44:03,053 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-26 19:44:03,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:44:03 BoogieIcfgContainer [2020-10-26 19:44:03,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:44:03,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:44:03,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:44:03,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:44:03,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:44:02" (1/3) ... [2020-10-26 19:44:03,065 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28349a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:44:03, skipping insertion in model container [2020-10-26 19:44:03,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:44:02" (2/3) ... [2020-10-26 19:44:03,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28349a3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:44:03, skipping insertion in model container [2020-10-26 19:44:03,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:44:03" (3/3) ... [2020-10-26 19:44:03,069 INFO L111 eAbstractionObserver]: Analyzing ICFG array_monotonic.i [2020-10-26 19:44:03,083 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:44:03,089 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:44:03,105 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:44:03,152 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:44:03,152 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:44:03,152 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:44:03,153 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:44:03,153 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:44:03,153 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:44:03,153 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:44:03,153 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:44:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-26 19:44:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:44:03,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:03,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:03,189 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1575655028, now seen corresponding path program 1 times [2020-10-26 19:44:03,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:03,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358582383] [2020-10-26 19:44:03,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:44:03,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-26 19:44:03,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:44:03,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:44:03,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:03,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:03,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:03,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:03,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:03,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-26 19:44:03,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:03,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:03,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:03,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:03,749 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 19:44:03,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358582383] [2020-10-26 19:44:03,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:44:03,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:44:03,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749561897] [2020-10-26 19:44:03,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:44:03,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:03,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:44:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:44:03,783 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-10-26 19:44:03,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:03,917 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2020-10-26 19:44:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:44:03,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-10-26 19:44:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:03,927 INFO L225 Difference]: With dead ends: 50 [2020-10-26 19:44:03,928 INFO L226 Difference]: Without dead ends: 23 [2020-10-26 19:44:03,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:44:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-26 19:44:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-26 19:44:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-26 19:44:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-26 19:44:03,975 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2020-10-26 19:44:03,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:03,976 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-26 19:44:03,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:44:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-26 19:44:03,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:44:03,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:03,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:03,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:44:03,978 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash 585993527, now seen corresponding path program 1 times [2020-10-26 19:44:03,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:03,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996762402] [2020-10-26 19:44:03,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:44:04,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-26 19:44:04,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:44:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:44:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:04,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:04,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:04,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:04,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:04,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:04,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:04,219 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 19:44:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996762402] [2020-10-26 19:44:04,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:44:04,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:44:04,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673333207] [2020-10-26 19:44:04,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:44:04,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:04,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:44:04,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:44:04,223 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-26 19:44:04,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:04,427 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-26 19:44:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:44:04,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-26 19:44:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:04,432 INFO L225 Difference]: With dead ends: 45 [2020-10-26 19:44:04,432 INFO L226 Difference]: Without dead ends: 31 [2020-10-26 19:44:04,433 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 19:44:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-26 19:44:04,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2020-10-26 19:44:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-26 19:44:04,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-26 19:44:04,446 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 16 [2020-10-26 19:44:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:04,446 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-26 19:44:04,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:44:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-26 19:44:04,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:44:04,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:04,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:04,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:44:04,448 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:04,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:04,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2059042534, now seen corresponding path program 1 times [2020-10-26 19:44:04,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:04,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398079559] [2020-10-26 19:44:04,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:04,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:04,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:44:05,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:05,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 592 [2020-10-26 19:44:05,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:44:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:05,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:44:05,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:05,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:05,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:05,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:05,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:05,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:05,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:05,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:05,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398079559] [2020-10-26 19:44:05,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:05,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:44:05,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735637013] [2020-10-26 19:44:05,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:44:05,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:44:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:44:05,153 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 5 states. [2020-10-26 19:44:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:05,318 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-10-26 19:44:05,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:44:05,319 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:44:05,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:05,320 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:44:05,320 INFO L226 Difference]: Without dead ends: 39 [2020-10-26 19:44:05,321 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 19:44:05,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-26 19:44:05,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2020-10-26 19:44:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:44:05,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-26 19:44:05,330 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2020-10-26 19:44:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:05,331 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-26 19:44:05,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:44:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-26 19:44:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:44:05,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:05,332 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:05,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:44:05,333 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash -313820457, now seen corresponding path program 2 times [2020-10-26 19:44:05,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:05,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166819916] [2020-10-26 19:44:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:05,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:05,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:44:06,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:44:06,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 655 [2020-10-26 19:44:06,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:06,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:44:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:06,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:44:06,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:06,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:06,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:06,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:06,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:06,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:06,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:06,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:06,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166819916] [2020-10-26 19:44:06,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:06,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:44:06,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462464850] [2020-10-26 19:44:06,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:44:06,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:06,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:44:06,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:06,358 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-10-26 19:44:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:06,814 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-10-26 19:44:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:44:06,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:44:06,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:06,817 INFO L225 Difference]: With dead ends: 51 [2020-10-26 19:44:06,817 INFO L226 Difference]: Without dead ends: 47 [2020-10-26 19:44:06,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:06,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-26 19:44:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-10-26 19:44:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:44:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-26 19:44:06,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 22 [2020-10-26 19:44:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:06,828 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-26 19:44:06,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:44:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-26 19:44:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:44:06,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:06,830 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:06,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:44:06,830 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:06,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:06,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1593684135, now seen corresponding path program 1 times [2020-10-26 19:44:06,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:06,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847421104] [2020-10-26 19:44:06,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:06,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:06,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:07,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:44:07,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:07,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-26 19:44:07,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:44:07,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:07,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:44:07,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:07,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:07,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:07,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:07,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:07,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:07,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:07,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:07,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:07,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:07,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847421104] [2020-10-26 19:44:07,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:07,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:44:07,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279893924] [2020-10-26 19:44:07,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:44:07,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:44:07,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:07,757 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 11 states. [2020-10-26 19:44:08,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:08,022 INFO L93 Difference]: Finished difference Result 70 states and 85 transitions. [2020-10-26 19:44:08,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:44:08,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-26 19:44:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:08,026 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:44:08,026 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:44:08,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:08,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:44:08,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-26 19:44:08,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:44:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-26 19:44:08,038 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 22 [2020-10-26 19:44:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:08,038 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-26 19:44:08,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:44:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-26 19:44:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:44:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:08,040 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:08,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:44:08,040 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:08,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash 253061821, now seen corresponding path program 1 times [2020-10-26 19:44:08,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:08,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399706048] [2020-10-26 19:44:08,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:08,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:08,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:44:10,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:44:10,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1953 [2020-10-26 19:44:10,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:44:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:10,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:44:10,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:10,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:10,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:10,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:10,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:10,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:10,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:10,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:10,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399706048] [2020-10-26 19:44:10,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:10,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:44:10,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593768107] [2020-10-26 19:44:10,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:44:10,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:10,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:44:10,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:44:10,088 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 6 states. [2020-10-26 19:44:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:10,236 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-10-26 19:44:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:44:10,237 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-26 19:44:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:10,239 INFO L225 Difference]: With dead ends: 89 [2020-10-26 19:44:10,239 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:44:10,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:44:10,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:44:10,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2020-10-26 19:44:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-26 19:44:10,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-10-26 19:44:10,259 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 25 [2020-10-26 19:44:10,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:10,261 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-10-26 19:44:10,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:44:10,261 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-10-26 19:44:10,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:44:10,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:10,262 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:10,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:44:10,263 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:10,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:10,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1402605180, now seen corresponding path program 2 times [2020-10-26 19:44:10,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:10,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860781059] [2020-10-26 19:44:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:10,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:10,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:11,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:11,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:44:11,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:44:11,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1611 [2020-10-26 19:44:11,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:11,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:44:11,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:11,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:44:11,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:12,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:12,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:12,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:12,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:12,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:12,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860781059] [2020-10-26 19:44:12,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:12,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:44:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007286679] [2020-10-26 19:44:12,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:44:12,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:44:12,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:12,639 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 14 states. [2020-10-26 19:44:13,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:13,601 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-26 19:44:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:44:13,603 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 25 [2020-10-26 19:44:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:13,604 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:44:13,604 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:44:13,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:44:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:44:13,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 51. [2020-10-26 19:44:13,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:44:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-26 19:44:13,616 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 25 [2020-10-26 19:44:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:13,617 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-26 19:44:13,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:44:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-26 19:44:13,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:44:13,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:13,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:13,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:44:13,618 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:13,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:13,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1144439742, now seen corresponding path program 3 times [2020-10-26 19:44:13,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:13,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386826618] [2020-10-26 19:44:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:13,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:13,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:13,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:15,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:44:15,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:44:15,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1760 [2020-10-26 19:44:15,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:44:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:15,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:15,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:15,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:15,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:15,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:15,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:44:15,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:15,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:15,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:15,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386826618] [2020-10-26 19:44:15,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:15,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:44:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399276217] [2020-10-26 19:44:15,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:44:15,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:15,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:44:15,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:15,749 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 13 states. [2020-10-26 19:44:16,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:16,036 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2020-10-26 19:44:16,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:44:16,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-10-26 19:44:16,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:16,038 INFO L225 Difference]: With dead ends: 80 [2020-10-26 19:44:16,038 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:44:16,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:16,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:44:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2020-10-26 19:44:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:44:16,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2020-10-26 19:44:16,049 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 25 [2020-10-26 19:44:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:16,049 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2020-10-26 19:44:16,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:44:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2020-10-26 19:44:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:16,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:16,051 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:16,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:44:16,078 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:16,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:16,079 INFO L82 PathProgramCache]: Analyzing trace with hash -562303506, now seen corresponding path program 2 times [2020-10-26 19:44:16,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:16,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922673296] [2020-10-26 19:44:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:16,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:16,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:19,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:19,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:19,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:44:19,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3893 [2020-10-26 19:44:19,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:19,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:19,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:20,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:20,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:20,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:20,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:20,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:20,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:20,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:44:20,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922673296] [2020-10-26 19:44:20,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:44:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870179769] [2020-10-26 19:44:20,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:44:20,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:20,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:44:20,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:44:20,335 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand 11 states. [2020-10-26 19:44:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:20,673 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-10-26 19:44:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:44:20,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-26 19:44:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:20,676 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:44:20,676 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:44:20,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:44:20,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:44:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-10-26 19:44:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:44:20,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-10-26 19:44:20,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 28 [2020-10-26 19:44:20,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:20,703 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-10-26 19:44:20,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:44:20,703 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-10-26 19:44:20,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:20,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:20,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:20,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:44:20,706 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:20,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1842167184, now seen corresponding path program 1 times [2020-10-26 19:44:20,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:20,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643566494] [2020-10-26 19:44:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:20,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:20,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:21,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:23,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:23,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:44:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3030 [2020-10-26 19:44:23,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:23,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:44:23,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:44:23,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:23,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:23,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:23,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:23,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:23,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:44:23,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:23,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:23,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:23,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643566494] [2020-10-26 19:44:23,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:23,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:23,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70396670] [2020-10-26 19:44:23,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:23,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:23,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:23,969 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 12 states. [2020-10-26 19:44:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:24,500 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2020-10-26 19:44:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:44:24,502 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-26 19:44:24,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:24,504 INFO L225 Difference]: With dead ends: 95 [2020-10-26 19:44:24,504 INFO L226 Difference]: Without dead ends: 91 [2020-10-26 19:44:24,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:44:24,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-26 19:44:24,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-26 19:44:24,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-26 19:44:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2020-10-26 19:44:24,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 28 [2020-10-26 19:44:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:24,517 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-10-26 19:44:24,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2020-10-26 19:44:24,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:24,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:24,520 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:24,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:44:24,520 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:24,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:24,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1738519084, now seen corresponding path program 2 times [2020-10-26 19:44:24,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:24,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220457489] [2020-10-26 19:44:24,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:24,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:27,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:28,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:28,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:44:28,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3734 [2020-10-26 19:44:28,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:28,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:28,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:44:28,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:28,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:28,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:28,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:28,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:28,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:44:28,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:28,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:28,482 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:28,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220457489] [2020-10-26 19:44:28,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:28,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517154769] [2020-10-26 19:44:28,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:28,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:28,485 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand 12 states. [2020-10-26 19:44:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:28,749 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2020-10-26 19:44:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:44:28,750 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-26 19:44:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:28,751 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:44:28,751 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:44:28,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:44:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:44:28,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-26 19:44:28,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-26 19:44:28,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2020-10-26 19:44:28,778 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 28 [2020-10-26 19:44:28,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:28,779 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2020-10-26 19:44:28,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2020-10-26 19:44:28,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:44:28,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:28,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:28,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:44:28,785 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash 458655406, now seen corresponding path program 3 times [2020-10-26 19:44:28,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:28,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703232636] [2020-10-26 19:44:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:28,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:28,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:29,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:30,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:30,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:30,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:44:30,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:44:30,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2183 [2020-10-26 19:44:30,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:30,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:30,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:44:30,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 19:44:31,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:44:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:31,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:31,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:44:31,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:44:31,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:44:31,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:31,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:44:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:44:31,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:44:31,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:44:31,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703232636] [2020-10-26 19:44:31,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:44:31,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:44:31,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978038171] [2020-10-26 19:44:31,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:44:31,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:44:31,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:44:31,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:44:31,212 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand 12 states. [2020-10-26 19:44:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:44:31,679 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2020-10-26 19:44:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:44:31,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-26 19:44:31,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:44:31,682 INFO L225 Difference]: With dead ends: 139 [2020-10-26 19:44:31,682 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:44:31,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:44:31,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:44:31,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2020-10-26 19:44:31,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:44:31,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2020-10-26 19:44:31,702 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 28 [2020-10-26 19:44:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:44:31,702 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2020-10-26 19:44:31,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:44:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2020-10-26 19:44:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:44:31,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:44:31,705 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:44:31,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:44:31,706 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:44:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:44:31,710 INFO L82 PathProgramCache]: Analyzing trace with hash 224022660, now seen corresponding path program 4 times [2020-10-26 19:44:31,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:44:31,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009435993] [2020-10-26 19:44:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:44:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:44:31,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:32,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:44:36,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:44:36,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:44:36,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:44:36,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4496 [2020-10-26 19:44:36,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:44:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:44:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:44:36,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:44:36,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:44:36,234 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 9: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,235 ERROR L253 erpolLogProxyWrapper]: Interpolant 9 not inductive [2020-10-26 19:44:36,235 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 10: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,236 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 11: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,237 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 12: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,238 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 13: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,239 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 14: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,240 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 15: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,241 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 16: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,242 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 17: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,242 ERROR L253 erpolLogProxyWrapper]: Symbol error in Interpolant 18: A-local: [], B-local: [(main_~i~0_22 Int)]. [2020-10-26 19:44:36,243 ERROR L253 erpolLogProxyWrapper]: Interpolant 19 not inductive [2020-10-26 19:44:36,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:44:36,245 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-26 19:44:36,250 INFO L168 Benchmark]: Toolchain (without parser) took 34081.19 ms. Allocated memory was 153.1 MB in the beginning and 355.5 MB in the end (delta: 202.4 MB). Free memory was 128.0 MB in the beginning and 128.9 MB in the end (delta: -891.0 kB). Peak memory consumption was 206.7 MB. Max. memory is 8.0 GB. [2020-10-26 19:44:36,251 INFO L168 Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 153.1 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-26 19:44:36,251 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.68 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 117.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-26 19:44:36,252 INFO L168 Benchmark]: Boogie Preprocessor took 39.85 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-26 19:44:36,253 INFO L168 Benchmark]: RCFGBuilder took 584.92 ms. Allocated memory is still 153.1 MB. Free memory was 116.4 MB in the beginning and 101.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-26 19:44:36,253 INFO L168 Benchmark]: TraceAbstraction took 33189.24 ms. Allocated memory was 153.1 MB in the beginning and 355.5 MB in the end (delta: 202.4 MB). Free memory was 101.1 MB in the beginning and 128.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 179.4 MB. Max. memory is 8.0 GB. [2020-10-26 19:44:36,256 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.68 ms. Allocated memory is still 153.1 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 248.68 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 117.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.85 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 116.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 584.92 ms. Allocated memory is still 153.1 MB. Free memory was 116.4 MB in the beginning and 101.5 MB in the end (delta: 14.9 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 33189.24 ms. Allocated memory was 153.1 MB in the beginning and 355.5 MB in the end (delta: 202.4 MB). Free memory was 101.1 MB in the beginning and 128.9 MB in the end (delta: -27.8 MB). Peak memory consumption was 179.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...