/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/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 07:08:00,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 07:08:00,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 07:08:00,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-01 07:08:00,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 07:08:00,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 07:08:00,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 07:08:00,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 07:08:00,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 07:08:00,789 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 07:08:00,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 07:08:00,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 07:08:00,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 07:08:00,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 07:08:00,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 07:08:00,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 07:08:00,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 07:08:00,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 07:08:00,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 07:08:00,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 07:08:00,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-01 07:08:00,842 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 07:08:00,842 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 07:08:00,845 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 07:08:00,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 07:08:00,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 07:08:00,847 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 07:08:00,848 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 07:08:00,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 07:08:00,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 07:08:00,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 07:08:00,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-01 07:08:00,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-01 07:08:00,849 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-01 07:08:00,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 07:08:01,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 07:08:01,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 07:08:01,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 07:08:01,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 07:08:01,205 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 07:08:01,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-05-01 07:08:01,264 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06592678/c16f0681115d441192384b3c0f736152/FLAGfdcaa8696 [2021-05-01 07:08:01,776 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 07:08:01,776 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-05-01 07:08:01,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06592678/c16f0681115d441192384b3c0f736152/FLAGfdcaa8696 [2021-05-01 07:08:02,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d06592678/c16f0681115d441192384b3c0f736152 [2021-05-01 07:08:02,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 07:08:02,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-01 07:08:02,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 07:08:02,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 07:08:02,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 07:08:02,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3515c413 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02, skipping insertion in model container [2021-05-01 07:08:02,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 07:08:02,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 07:08:02,316 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-05-01 07:08:02,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:08:02,395 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 07:08:02,410 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-05-01 07:08:02,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 07:08:02,451 INFO L208 MainTranslator]: Completed translation [2021-05-01 07:08:02,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02 WrapperNode [2021-05-01 07:08:02,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 07:08:02,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 07:08:02,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 07:08:02,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 07:08:02,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,475 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,493 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (1/1) ... [2021-05-01 07:08:02,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 07:08:02,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 07:08:02,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 07:08:02,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 07:08:02,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (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 [2021-05-01 07:08:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 07:08:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 07:08:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 07:08:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 07:08:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 07:08:02,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 07:08:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 07:08:02,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 07:08:02,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 07:08:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-01 07:08:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 07:08:02,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 07:08:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 07:08:02,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 07:08:02,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 07:08:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 07:08:02,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 07:08:02,929 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 07:08:02,929 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-01 07:08:02,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:08:02 BoogieIcfgContainer [2021-05-01 07:08:02,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 07:08:02,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 07:08:02,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 07:08:02,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 07:08:02,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 07:08:02" (1/3) ... [2021-05-01 07:08:02,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60311fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:08:02, skipping insertion in model container [2021-05-01 07:08:02,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 07:08:02" (2/3) ... [2021-05-01 07:08:02,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60311fb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 07:08:02, skipping insertion in model container [2021-05-01 07:08:02,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 07:08:02" (3/3) ... [2021-05-01 07:08:02,938 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2021-05-01 07:08:02,942 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-01 07:08:02,946 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 07:08:02,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 07:08:02,978 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 07:08:02,978 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-01 07:08:02,978 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-01 07:08:02,978 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 07:08:02,978 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 07:08:02,978 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 07:08:02,978 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 07:08:02,978 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 07:08:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:03,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 07:08:03,004 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:03,005 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:03,005 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:03,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:03,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1772946259, now seen corresponding path program 1 times [2021-05-01 07:08:03,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:03,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879809310] [2021-05-01 07:08:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:03,082 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:03,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,238 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:03,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:03,244 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-05-01 07:08:03,263 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,264 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:03,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,284 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:03,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:03,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:03,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:03,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:03,385 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:03,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879809310] [2021-05-01 07:08:03,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [879809310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:03,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:03,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:08:03,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523010599] [2021-05-01 07:08:03,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:08:03,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:08:03,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 07:08:03,405 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 18 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:08:03,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:03,988 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2021-05-01 07:08:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:08:03,990 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-01 07:08:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:03,997 INFO L225 Difference]: With dead ends: 88 [2021-05-01 07:08:03,997 INFO L226 Difference]: Without dead ends: 47 [2021-05-01 07:08:04,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 232.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 07:08:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-01 07:08:04,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-05-01 07:08:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-05-01 07:08:04,047 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2021-05-01 07:08:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:04,047 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-05-01 07:08:04,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:08:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-05-01 07:08:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-01 07:08:04,048 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:04,049 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:04,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 07:08:04,049 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1794902226, now seen corresponding path program 1 times [2021-05-01 07:08:04,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:04,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136798341] [2021-05-01 07:08:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:04,053 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:04,084 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:04,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:04,096 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,097 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:04,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,102 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:04,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:04,151 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:04,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136798341] [2021-05-01 07:08:04,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [136798341] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:04,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:04,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:08:04,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834585556] [2021-05-01 07:08:04,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:08:04,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:04,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:08:04,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 07:08:04,157 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:08:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:04,518 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2021-05-01 07:08:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:08:04,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-01 07:08:04,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:04,530 INFO L225 Difference]: With dead ends: 55 [2021-05-01 07:08:04,530 INFO L226 Difference]: Without dead ends: 53 [2021-05-01 07:08:04,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 07:08:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-01 07:08:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-05-01 07:08:04,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-05-01 07:08:04,558 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2021-05-01 07:08:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:04,558 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-05-01 07:08:04,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 07:08:04,558 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-05-01 07:08:04,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-01 07:08:04,559 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:04,559 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:04,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-01 07:08:04,560 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:04,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1560251136, now seen corresponding path program 1 times [2021-05-01 07:08:04,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:04,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872023907] [2021-05-01 07:08:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:04,572 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:04,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,639 INFO L142 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-05-01 07:08:04,640 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:04,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:04,648 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:04,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:04,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:04,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:04,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:04,708 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:04,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872023907] [2021-05-01 07:08:04,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872023907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:04,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:04,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:08:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845989483] [2021-05-01 07:08:04,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:08:04,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:04,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:08:04,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 07:08:04,712 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 07:08:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:05,033 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-01 07:08:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:08:05,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-05-01 07:08:05,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:05,036 INFO L225 Difference]: With dead ends: 57 [2021-05-01 07:08:05,058 INFO L226 Difference]: Without dead ends: 55 [2021-05-01 07:08:05,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 07:08:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-01 07:08:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-01 07:08:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-05-01 07:08:05,084 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2021-05-01 07:08:05,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:05,085 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-05-01 07:08:05,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-01 07:08:05,085 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-05-01 07:08:05,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-01 07:08:05,086 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:05,086 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:05,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-01 07:08:05,086 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1084781042, now seen corresponding path program 1 times [2021-05-01 07:08:05,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:05,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335232861] [2021-05-01 07:08:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:05,089 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:05,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:05,148 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:05,150 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,150 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:05,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:05,160 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,161 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:05,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:05,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,206 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:05,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 07:08:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,229 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:05,230 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:05,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335232861] [2021-05-01 07:08:05,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [335232861] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:05,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:05,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 07:08:05,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096077371] [2021-05-01 07:08:05,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 07:08:05,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 07:08:05,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:08:05,235 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 07:08:05,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:05,543 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-01 07:08:05,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 07:08:05,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-01 07:08:05,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:05,545 INFO L225 Difference]: With dead ends: 61 [2021-05-01 07:08:05,545 INFO L226 Difference]: Without dead ends: 59 [2021-05-01 07:08:05,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-01 07:08:05,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-01 07:08:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-01 07:08:05,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-05-01 07:08:05,559 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2021-05-01 07:08:05,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:05,559 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-05-01 07:08:05,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-01 07:08:05,560 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-05-01 07:08:05,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-01 07:08:05,560 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:05,561 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:05,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-01 07:08:05,561 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1893905473, now seen corresponding path program 1 times [2021-05-01 07:08:05,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:05,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215820617] [2021-05-01 07:08:05,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:05,564 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,597 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,597 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,600 INFO L142 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-05-01 07:08:05,601 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 07:08:05,604 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:05,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:05,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,646 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 07:08:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,656 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-05-01 07:08:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:05,666 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:05,667 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 07:08:05,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:05,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215820617] [2021-05-01 07:08:05,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [215820617] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:05,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:05,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-01 07:08:05,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676419659] [2021-05-01 07:08:05,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-01 07:08:05,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:05,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-01 07:08:05,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-01 07:08:05,669 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 07:08:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:06,055 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-05-01 07:08:06,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-01 07:08:06,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-01 07:08:06,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:06,061 INFO L225 Difference]: With dead ends: 66 [2021-05-01 07:08:06,061 INFO L226 Difference]: Without dead ends: 64 [2021-05-01 07:08:06,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 121.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-01 07:08:06,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-01 07:08:06,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-01 07:08:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-05-01 07:08:06,081 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2021-05-01 07:08:06,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:06,082 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-05-01 07:08:06,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-01 07:08:06,082 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-05-01 07:08:06,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-01 07:08:06,083 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:06,083 INFO L519 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:06,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-01 07:08:06,084 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:06,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:06,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1991737873, now seen corresponding path program 1 times [2021-05-01 07:08:06,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:06,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995968008] [2021-05-01 07:08:06,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:06,086 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,112 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:06,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:06,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,122 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:06,126 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:06,132 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,170 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,171 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,176 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 07:08:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 07:08:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,187 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 07:08:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,191 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,191 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 07:08:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,199 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 07:08:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-01 07:08:06,206 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:06,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995968008] [2021-05-01 07:08:06,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995968008] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:06,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:06,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-01 07:08:06,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171971197] [2021-05-01 07:08:06,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-01 07:08:06,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:06,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-01 07:08:06,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-01 07:08:06,209 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 07:08:06,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:06,567 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-05-01 07:08:06,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-01 07:08:06,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-01 07:08:06,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:06,569 INFO L225 Difference]: With dead ends: 75 [2021-05-01 07:08:06,569 INFO L226 Difference]: Without dead ends: 73 [2021-05-01 07:08:06,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-01 07:08:06,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-01 07:08:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-05-01 07:08:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-05-01 07:08:06,583 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2021-05-01 07:08:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:06,583 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-05-01 07:08:06,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-01 07:08:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-05-01 07:08:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-01 07:08:06,585 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:06,585 INFO L519 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:06,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-01 07:08:06,585 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1947441265, now seen corresponding path program 1 times [2021-05-01 07:08:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:06,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399716597] [2021-05-01 07:08:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:06,588 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,620 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:06,629 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:06,633 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:06,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:06,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:06,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,684 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,685 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,701 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,701 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 07:08:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,707 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 07:08:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,712 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 07:08:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,720 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,721 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 07:08:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,725 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,725 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 07:08:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,733 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,733 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-01 07:08:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,740 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-01 07:08:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:06,745 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:06,745 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-01 07:08:06,745 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:06,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399716597] [2021-05-01 07:08:06,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [399716597] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:06,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:06,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-01 07:08:06,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647553611] [2021-05-01 07:08:06,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-01 07:08:06,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:06,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-01 07:08:06,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-01 07:08:06,747 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-01 07:08:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:07,071 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-05-01 07:08:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-01 07:08:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 57 [2021-05-01 07:08:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:07,073 INFO L225 Difference]: With dead ends: 75 [2021-05-01 07:08:07,073 INFO L226 Difference]: Without dead ends: 73 [2021-05-01 07:08:07,074 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-01 07:08:07,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-01 07:08:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-05-01 07:08:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-01 07:08:07,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-05-01 07:08:07,086 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2021-05-01 07:08:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:07,087 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-05-01 07:08:07,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-01 07:08:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-05-01 07:08:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-01 07:08:07,088 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 07:08:07,088 INFO L519 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 07:08:07,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-01 07:08:07,089 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 07:08:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 07:08:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1358511123, now seen corresponding path program 1 times [2021-05-01 07:08:07,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-01 07:08:07,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647477947] [2021-05-01 07:08:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 07:08:07,091 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-01 07:08:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,118 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:07,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,121 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:07,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:07,130 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,131 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-05-01 07:08:07,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:07,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-05-01 07:08:07,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,156 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 07:08:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-05-01 07:08:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,182 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,182 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-05-01 07:08:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,185 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-01 07:08:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-05-01 07:08:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,193 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,193 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-01 07:08:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,197 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-01 07:08:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,202 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,202 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-01 07:08:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,205 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,205 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-01 07:08:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-01 07:08:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,212 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,212 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-05-01 07:08:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 07:08:07,216 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 07:08:07,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 07:08:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-01 07:08:07,218 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-01 07:08:07,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647477947] [2021-05-01 07:08:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [647477947] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 07:08:07,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 07:08:07,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-01 07:08:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674408832] [2021-05-01 07:08:07,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-01 07:08:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-01 07:08:07,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-01 07:08:07,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-01 07:08:07,219 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-01 07:08:07,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 07:08:07,569 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-05-01 07:08:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-01 07:08:07,570 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 68 [2021-05-01 07:08:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 07:08:07,570 INFO L225 Difference]: With dead ends: 73 [2021-05-01 07:08:07,571 INFO L226 Difference]: Without dead ends: 0 [2021-05-01 07:08:07,571 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-01 07:08:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-01 07:08:07,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-01 07:08:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-01 07:08:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-01 07:08:07,572 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-05-01 07:08:07,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 07:08:07,573 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-01 07:08:07,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-01 07:08:07,573 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-01 07:08:07,573 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-01 07:08:07,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-01 07:08:07,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-01 07:08:08,603 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-01 07:08:08,603 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-01 07:08:08,603 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-01 07:08:08,603 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-01 07:08:08,604 INFO L201 CegarLoopUtils]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2021-05-01 07:08:08,604 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-01 07:08:08,604 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:08:08,604 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:08:08,604 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-01 07:08:08,604 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L201 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: true [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L60(line 60) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L201 CegarLoopUtils]: At program point mainEXIT(lines 24 67) the Hoare annotation is: true [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,605 INFO L194 CegarLoopUtils]: At program point L36(lines 36 63) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,606 INFO L194 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L201 CegarLoopUtils]: At program point mainFINAL(lines 24 67) the Hoare annotation is: true [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L201 CegarLoopUtils]: At program point L34-3(lines 34 65) the Hoare annotation is: true [2021-05-01 07:08:08,607 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L43(line 43) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,607 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-05-01 07:08:08,608 INFO L194 CegarLoopUtils]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 07:08:08,608 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-01 07:08:08,608 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 07:08:08,608 INFO L194 CegarLoopUtils]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:08:08,608 INFO L194 CegarLoopUtils]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2021-05-01 07:08:08,608 INFO L194 CegarLoopUtils]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2021-05-01 07:08:08,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 07:08:08 BoogieIcfgContainer [2021-05-01 07:08:08,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 07:08:08,624 INFO L168 Benchmark]: Toolchain (without parser) took 6461.84 ms. Allocated memory was 190.8 MB in the beginning and 281.0 MB in the end (delta: 90.2 MB). Free memory was 155.9 MB in the beginning and 176.3 MB in the end (delta: -20.4 MB). Peak memory consumption was 146.2 MB. Max. memory is 8.0 GB. [2021-05-01 07:08:08,624 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 07:08:08,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.96 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 173.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-01 07:08:08,625 INFO L168 Benchmark]: Boogie Preprocessor took 42.96 ms. Allocated memory is still 190.8 MB. Free memory was 173.2 MB in the beginning and 171.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 07:08:08,625 INFO L168 Benchmark]: RCFGBuilder took 434.32 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 154.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-01 07:08:08,625 INFO L168 Benchmark]: TraceAbstraction took 5691.15 ms. Allocated memory was 190.8 MB in the beginning and 281.0 MB in the end (delta: 90.2 MB). Free memory was 153.6 MB in the beginning and 176.3 MB in the end (delta: -22.7 MB). Peak memory consumption was 143.8 MB. Max. memory is 8.0 GB. [2021-05-01 07:08:08,626 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.96 ms. Allocated memory is still 190.8 MB. Free memory was 155.7 MB in the beginning and 173.2 MB in the end (delta: -17.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.96 ms. Allocated memory is still 190.8 MB. Free memory was 173.2 MB in the beginning and 171.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 434.32 ms. Allocated memory is still 190.8 MB. Free memory was 171.8 MB in the beginning and 154.0 MB in the end (delta: 17.8 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5691.15 ms. Allocated memory was 190.8 MB in the beginning and 281.0 MB in the end (delta: 90.2 MB). Free memory was 153.6 MB in the beginning and 176.3 MB in the end (delta: -22.7 MB). Peak memory consumption was 143.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4598.0ms, OverallIterations: 8, TraceHistogramMax: 11, EmptinessCheckTime: 23.4ms, AutomataDifference: 3079.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1028.8ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 286 SDtfs, 248 SDslu, 495 SDs, 0 SdLazy, 1159 SolverSat, 485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1461.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1238.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, InterpolantAutomatonStates: 63, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 142.6ms AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 43 LocationsWithAnnotation, 235 PreInvPairs, 302 NumberOfFragments, 567 HoareAnnotationTreeSize, 235 FomulaSimplifications, 3399 FormulaSimplificationTreeSizeReduction, 246.0ms HoareSimplificationTime, 43 FomulaSimplificationsInter, 1104 FormulaSimplificationTreeSizeReductionInter, 750.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i < len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == 0 || !(cond == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...