/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:28:12,468 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:28:12,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:28:12,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:28:12,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:28:12,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:28:12,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:28:12,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:28:12,524 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:28:12,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:28:12,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:28:12,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:28:12,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:28:12,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:28:12,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:28:12,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:28:12,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:28:12,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:28:12,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:28:12,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:28:12,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:28:12,593 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:28:12,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:28:12,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:28:12,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:28:12,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:28:12,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:28:12,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:28:12,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:28:12,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:28:12,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:28:12,598 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:28:12,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:28:12,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:28:12,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:28:12,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:28:12,599 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:28:12,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:28:12,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:28:12,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:28:12,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:28:12,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:28:12,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:28:12,600 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:28:12,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:28:13,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:28:13,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:28:13,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:28:13,010 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:28:13,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label04.c [2021-02-23 18:28:13,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f46b7e43/db4d789f02c045438b2642b7a94e4863/FLAGfd7a7a4c7 [2021-02-23 18:28:13,851 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:28:13,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label04.c [2021-02-23 18:28:13,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f46b7e43/db4d789f02c045438b2642b7a94e4863/FLAGfd7a7a4c7 [2021-02-23 18:28:14,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f46b7e43/db4d789f02c045438b2642b7a94e4863 [2021-02-23 18:28:14,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:28:14,098 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:28:14,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:28:14,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:28:14,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:28:14,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,110 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33217ec4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14, skipping insertion in model container [2021-02-23 18:28:14,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:28:14,186 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:28:14,426 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label04.c[7502,7515] [2021-02-23 18:28:14,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:28:14,611 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:28:14,651 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label04.c[7502,7515] [2021-02-23 18:28:14,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:28:14,791 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:28:14,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14 WrapperNode [2021-02-23 18:28:14,792 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:28:14,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:28:14,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:28:14,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:28:14,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... [2021-02-23 18:28:14,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:28:14,948 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:28:14,948 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:28:14,948 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:28:14,949 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-23 18:28:15,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:28:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:28:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:28:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2021-02-23 18:28:15,057 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:28:15,057 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 18:28:15,058 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:28:15,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:28:15,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:28:15,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:28:15,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:28:15,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:28:15,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:28:17,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:28:17,128 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 18:28:17,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:28:17 BoogieIcfgContainer [2021-02-23 18:28:17,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:28:17,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:28:17,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:28:17,141 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:28:17,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:28:14" (1/3) ... [2021-02-23 18:28:17,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9f9af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:28:17, skipping insertion in model container [2021-02-23 18:28:17,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:28:14" (2/3) ... [2021-02-23 18:28:17,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f9f9af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:28:17, skipping insertion in model container [2021-02-23 18:28:17,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:28:17" (3/3) ... [2021-02-23 18:28:17,147 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem10_label04.c [2021-02-23 18:28:17,155 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:28:17,162 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:28:17,186 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:28:17,226 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:28:17,226 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:28:17,226 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:28:17,249 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:28:17,249 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:28:17,249 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:28:17,249 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:28:17,250 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:28:17,294 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2021-02-23 18:28:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-02-23 18:28:17,318 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:17,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:17,319 INFO L428 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -570091867, now seen corresponding path program 1 times [2021-02-23 18:28:17,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:17,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389352620] [2021-02-23 18:28:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:17,435 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:17,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:17,809 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,810 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:17,811 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:17,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:17,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:17,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:17,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:17,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:18,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389352620] [2021-02-23 18:28:18,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:18,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:28:18,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526338710] [2021-02-23 18:28:18,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:28:18,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:18,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:28:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:28:18,058 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 4 states. [2021-02-23 18:28:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:20,703 INFO L93 Difference]: Finished difference Result 1098 states and 1523 transitions. [2021-02-23 18:28:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 18:28:20,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2021-02-23 18:28:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:20,725 INFO L225 Difference]: With dead ends: 1098 [2021-02-23 18:28:20,726 INFO L226 Difference]: Without dead ends: 583 [2021-02-23 18:28:20,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:28:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-02-23 18:28:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 553. [2021-02-23 18:28:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2021-02-23 18:28:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 650 transitions. [2021-02-23 18:28:20,941 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 650 transitions. Word has length 93 [2021-02-23 18:28:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:20,942 INFO L480 AbstractCegarLoop]: Abstraction has 553 states and 650 transitions. [2021-02-23 18:28:20,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:28:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 650 transitions. [2021-02-23 18:28:20,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-02-23 18:28:20,950 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:20,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:20,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:28:20,951 INFO L428 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:20,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:20,952 INFO L82 PathProgramCache]: Analyzing trace with hash -128055709, now seen corresponding path program 1 times [2021-02-23 18:28:20,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:20,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953407479] [2021-02-23 18:28:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:21,248 WARN L202 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2021-02-23 18:28:21,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-23 18:28:21,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,381 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:28:21,409 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:28:21,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,456 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:28:21,468 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException [2021-02-23 18:28:21,470 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:21,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:21,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:21,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:21,738 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,739 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:28:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:21,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,788 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:21,789 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:21,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-23 18:28:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:21,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953407479] [2021-02-23 18:28:21,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:21,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 18:28:21,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984094260] [2021-02-23 18:28:21,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 18:28:21,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:21,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 18:28:21,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:28:21,867 INFO L87 Difference]: Start difference. First operand 553 states and 650 transitions. Second operand 5 states. [2021-02-23 18:28:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:24,010 INFO L93 Difference]: Finished difference Result 1255 states and 1535 transitions. [2021-02-23 18:28:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 18:28:24,011 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2021-02-23 18:28:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:24,019 INFO L225 Difference]: With dead ends: 1255 [2021-02-23 18:28:24,019 INFO L226 Difference]: Without dead ends: 725 [2021-02-23 18:28:24,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-23 18:28:24,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-02-23 18:28:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 705. [2021-02-23 18:28:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 705 states. [2021-02-23 18:28:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 815 transitions. [2021-02-23 18:28:24,154 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 815 transitions. Word has length 172 [2021-02-23 18:28:24,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:24,155 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 815 transitions. [2021-02-23 18:28:24,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 18:28:24,155 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 815 transitions. [2021-02-23 18:28:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-02-23 18:28:24,158 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:24,159 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:24,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:28:24,159 INFO L428 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:24,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2019474332, now seen corresponding path program 1 times [2021-02-23 18:28:24,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:24,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91050975] [2021-02-23 18:28:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:24,902 WARN L202 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 74 [2021-02-23 18:28:24,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:24,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:24,944 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException [2021-02-23 18:28:24,949 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:25,091 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:28:25,092 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:28:25,107 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:28:25,108 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:28:25,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,111 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:25,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:25,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:25,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:25,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,187 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:28:25,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,197 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 18:28:25,210 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:28:25,211 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:28:25,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:28:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:25,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:28:25,294 WARN L141 QuantifierPusher]: treesize reduction 3, result has 89.7 percent of original size [2021-02-23 18:28:25,295 WARN L147 QuantifierPusher]: treesize reduction 3, result has 89.7 percent of original size 26 [2021-02-23 18:28:25,315 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,317 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 18:28:25,333 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:25,334 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 18:28:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:25,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91050975] [2021-02-23 18:28:25,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:25,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-02-23 18:28:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006192527] [2021-02-23 18:28:25,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-23 18:28:25,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:25,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-23 18:28:25,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-02-23 18:28:25,452 INFO L87 Difference]: Start difference. First operand 705 states and 815 transitions. Second operand 12 states. [2021-02-23 18:28:25,995 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75 [2021-02-23 18:28:27,196 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-02-23 18:28:27,494 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2021-02-23 18:28:30,671 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2021-02-23 18:28:31,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:31,408 INFO L93 Difference]: Finished difference Result 2409 states and 2829 transitions. [2021-02-23 18:28:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-23 18:28:31,409 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 179 [2021-02-23 18:28:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:31,425 INFO L225 Difference]: With dead ends: 2409 [2021-02-23 18:28:31,426 INFO L226 Difference]: Without dead ends: 1727 [2021-02-23 18:28:31,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-02-23 18:28:31,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2021-02-23 18:28:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1482. [2021-02-23 18:28:31,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2021-02-23 18:28:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 1713 transitions. [2021-02-23 18:28:31,772 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 1713 transitions. Word has length 179 [2021-02-23 18:28:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:31,773 INFO L480 AbstractCegarLoop]: Abstraction has 1482 states and 1713 transitions. [2021-02-23 18:28:31,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-02-23 18:28:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 1713 transitions. [2021-02-23 18:28:31,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-02-23 18:28:31,776 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:31,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:31,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:28:31,777 INFO L428 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1759500475, now seen corresponding path program 1 times [2021-02-23 18:28:31,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:31,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98516017] [2021-02-23 18:28:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:32,036 WARN L202 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 50 [2021-02-23 18:28:32,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:28:32,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,122 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException [2021-02-23 18:28:32,124 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:32,209 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 18:28:32,210 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 18:28:32,215 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:28:32,216 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:28:32,227 WARN L141 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size [2021-02-23 18:28:32,228 WARN L147 QuantifierPusher]: treesize reduction 2, result has 86.7 percent of original size 13 [2021-02-23 18:28:32,230 WARN L141 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size [2021-02-23 18:28:32,231 WARN L147 QuantifierPusher]: treesize reduction 2, result has 88.9 percent of original size 16 [2021-02-23 18:28:32,245 WARN L141 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-02-23 18:28:32,248 WARN L147 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-02-23 18:28:32,267 WARN L141 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size [2021-02-23 18:28:32,268 WARN L147 QuantifierPusher]: treesize reduction 3, result has 87.5 percent of original size 21 [2021-02-23 18:28:32,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:32,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:32,368 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 18:28:32,368 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 18:28:32,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:28:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:32,419 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:32,420 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:32,422 WARN L141 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size [2021-02-23 18:28:32,423 WARN L147 QuantifierPusher]: treesize reduction 2, result has 77.8 percent of original size 7 [2021-02-23 18:28:32,425 WARN L141 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size [2021-02-23 18:28:32,426 WARN L147 QuantifierPusher]: treesize reduction 4, result has 71.4 percent of original size 10 [2021-02-23 18:28:32,440 WARN L141 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size [2021-02-23 18:28:32,441 WARN L147 QuantifierPusher]: treesize reduction 6, result has 68.4 percent of original size 13 [2021-02-23 18:28:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:32,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98516017] [2021-02-23 18:28:32,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:32,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:28:32,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056249236] [2021-02-23 18:28:32,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:28:32,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:32,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:28:32,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:28:32,636 INFO L87 Difference]: Start difference. First operand 1482 states and 1713 transitions. Second operand 11 states. [2021-02-23 18:28:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:35,682 INFO L93 Difference]: Finished difference Result 3370 states and 4031 transitions. [2021-02-23 18:28:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-02-23 18:28:35,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 182 [2021-02-23 18:28:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:35,701 INFO L225 Difference]: With dead ends: 3370 [2021-02-23 18:28:35,701 INFO L226 Difference]: Without dead ends: 1842 [2021-02-23 18:28:35,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-02-23 18:28:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2021-02-23 18:28:36,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1784. [2021-02-23 18:28:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2021-02-23 18:28:36,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2089 transitions. [2021-02-23 18:28:36,136 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2089 transitions. Word has length 182 [2021-02-23 18:28:36,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:36,136 INFO L480 AbstractCegarLoop]: Abstraction has 1784 states and 2089 transitions. [2021-02-23 18:28:36,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:28:36,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2089 transitions. [2021-02-23 18:28:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-02-23 18:28:36,140 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:36,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:36,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:28:36,141 INFO L428 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:36,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:36,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1921977013, now seen corresponding path program 1 times [2021-02-23 18:28:36,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:36,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950977906] [2021-02-23 18:28:36,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:36,319 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2021-02-23 18:28:36,338 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,339 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:36,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:36,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:28:36,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:36,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,421 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-02-23 18:28:36,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,442 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 18:28:36,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 25 [2021-02-23 18:28:36,493 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException [2021-02-23 18:28:36,495 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:36,596 WARN L141 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size [2021-02-23 18:28:36,597 WARN L147 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size 4 [2021-02-23 18:28:36,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,601 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:28:36,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:36,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:36,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:36,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:36,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:36,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:28:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:36,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:36,762 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:36,764 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:36,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950977906] [2021-02-23 18:28:36,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:36,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 18:28:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536559306] [2021-02-23 18:28:36,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 18:28:36,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 18:28:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-02-23 18:28:36,914 INFO L87 Difference]: Start difference. First operand 1784 states and 2089 transitions. Second operand 8 states. [2021-02-23 18:28:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:39,718 INFO L93 Difference]: Finished difference Result 4285 states and 5164 transitions. [2021-02-23 18:28:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 18:28:39,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 198 [2021-02-23 18:28:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:39,749 INFO L225 Difference]: With dead ends: 4285 [2021-02-23 18:28:39,749 INFO L226 Difference]: Without dead ends: 2524 [2021-02-23 18:28:39,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-02-23 18:28:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2021-02-23 18:28:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2434. [2021-02-23 18:28:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2021-02-23 18:28:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 2762 transitions. [2021-02-23 18:28:40,320 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 2762 transitions. Word has length 198 [2021-02-23 18:28:40,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:40,320 INFO L480 AbstractCegarLoop]: Abstraction has 2434 states and 2762 transitions. [2021-02-23 18:28:40,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 18:28:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 2762 transitions. [2021-02-23 18:28:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-02-23 18:28:40,324 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:40,325 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:40,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 18:28:40,327 INFO L428 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:40,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:40,328 INFO L82 PathProgramCache]: Analyzing trace with hash -867157510, now seen corresponding path program 1 times [2021-02-23 18:28:40,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:40,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199325993] [2021-02-23 18:28:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:41,046 WARN L202 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 54 [2021-02-23 18:28:41,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:41,101 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,104 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:28:41,108 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException [2021-02-23 18:28:41,110 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:28:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:41,238 WARN L141 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size [2021-02-23 18:28:41,239 WARN L147 QuantifierPusher]: treesize reduction 17, result has 19.0 percent of original size 4 [2021-02-23 18:28:41,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:28:41,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:28:41,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:28:41,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:41,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:28:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:41,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:41,313 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,313 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:41,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-23 18:28:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:28:41,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:28:41,390 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:28:41,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:28:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:28:41,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199325993] [2021-02-23 18:28:41,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:28:41,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-23 18:28:41,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864780015] [2021-02-23 18:28:41,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 18:28:41,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:28:41,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 18:28:41,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-23 18:28:41,506 INFO L87 Difference]: Start difference. First operand 2434 states and 2762 transitions. Second operand 7 states. [2021-02-23 18:28:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:28:45,177 INFO L93 Difference]: Finished difference Result 3648 states and 4207 transitions. [2021-02-23 18:28:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-23 18:28:45,181 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 217 [2021-02-23 18:28:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:28:45,211 INFO L225 Difference]: With dead ends: 3648 [2021-02-23 18:28:45,212 INFO L226 Difference]: Without dead ends: 3646 [2021-02-23 18:28:45,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-02-23 18:28:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3646 states. [2021-02-23 18:28:45,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3646 to 2894. [2021-02-23 18:28:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2021-02-23 18:28:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 3381 transitions. [2021-02-23 18:28:45,831 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 3381 transitions. Word has length 217 [2021-02-23 18:28:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:28:45,832 INFO L480 AbstractCegarLoop]: Abstraction has 2894 states and 3381 transitions. [2021-02-23 18:28:45,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 18:28:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 3381 transitions. [2021-02-23 18:28:45,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-02-23 18:28:45,847 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:28:45,847 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:28:45,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 18:28:45,848 INFO L428 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:28:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:28:45,848 INFO L82 PathProgramCache]: Analyzing trace with hash -330477818, now seen corresponding path program 1 times [2021-02-23 18:28:45,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:28:45,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940389883] [2021-02-23 18:28:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:28:45,893 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 64