/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:21,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:21,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:21,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:08:21,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:08:21,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:08:21,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:08:21,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:08:21,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:08:21,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:08:21,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:08:21,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:08:21,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:21,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:21,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:21,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:21,432 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:21,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:21,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:21,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:21,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:21,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:21,453 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:21,454 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:21,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:21,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:21,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:21,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:21,482 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:08:21,536 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:21,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:21,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:21,542 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:21,542 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:21,542 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:21,542 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:21,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:21,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:21,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:21,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:21,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:21,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:21,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:21,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:21,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:21,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:21,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:21,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:21,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:21,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:21,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:21,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:21,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:21,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:21,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:21,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:21,548 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:21,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:21,986 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:22,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:22,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:22,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:22,016 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:22,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2021-02-21 16:08:22,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a3092eb/d5b1335a4ca74a4d8ccc0ac3b915d971/FLAG67f759aaf [2021-02-21 16:08:22,751 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:22,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2021-02-21 16:08:22,759 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a3092eb/d5b1335a4ca74a4d8ccc0ac3b915d971/FLAG67f759aaf [2021-02-21 16:08:23,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81a3092eb/d5b1335a4ca74a4d8ccc0ac3b915d971 [2021-02-21 16:08:23,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:23,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:23,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:23,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:23,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:23,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52c1f575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23, skipping insertion in model container [2021-02-21 16:08:23,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:23,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:23,370 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2021-02-21 16:08:23,375 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:23,386 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:23,407 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2021-02-21 16:08:23,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:23,422 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:23,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23 WrapperNode [2021-02-21 16:08:23,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:23,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:23,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:23,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:23,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... [2021-02-21 16:08:23,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:23,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:23,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:23,466 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:23,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:23,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:23,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:23,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:23,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:23,564 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:23,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:23,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:23,915 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:23,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:23 BoogieIcfgContainer [2021-02-21 16:08:23,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:23,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:23,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:23,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:23,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:23" (1/3) ... [2021-02-21 16:08:23,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52aad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:23, skipping insertion in model container [2021-02-21 16:08:23,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:23" (2/3) ... [2021-02-21 16:08:23,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c52aad3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:23, skipping insertion in model container [2021-02-21 16:08:23,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:23" (3/3) ... [2021-02-21 16:08:23,927 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-02-21 16:08:23,934 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:23,940 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:23,963 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:23,996 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:23,996 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:23,996 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:23,997 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:23,997 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:23,997 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:23,997 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:23,997 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-21 16:08:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:08:24,042 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,045 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,046 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1747552289, now seen corresponding path program 1 times [2021-02-21 16:08:24,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221831026] [2021-02-21 16:08:24,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,401 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:24,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:24,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:24,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:24,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221831026] [2021-02-21 16:08:24,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:24,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:24,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914282852] [2021-02-21 16:08:24,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:24,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:24,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:24,546 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2021-02-21 16:08:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:24,809 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2021-02-21 16:08:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:24,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-21 16:08:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:24,827 INFO L225 Difference]: With dead ends: 64 [2021-02-21 16:08:24,827 INFO L226 Difference]: Without dead ends: 49 [2021-02-21 16:08:24,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-21 16:08:24,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-02-21 16:08:24,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-21 16:08:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-02-21 16:08:24,901 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-02-21 16:08:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:24,903 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-02-21 16:08:24,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:24,903 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-02-21 16:08:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:08:24,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:24,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:24,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:24,905 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:24,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1867356637, now seen corresponding path program 1 times [2021-02-21 16:08:24,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:24,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567983620] [2021-02-21 16:08:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:24,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,028 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,030 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:25,037 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,038 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,083 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567983620] [2021-02-21 16:08:25,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313085885] [2021-02-21 16:08:25,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,092 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2021-02-21 16:08:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,244 INFO L93 Difference]: Finished difference Result 78 states and 133 transitions. [2021-02-21 16:08:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-21 16:08:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,246 INFO L225 Difference]: With dead ends: 78 [2021-02-21 16:08:25,247 INFO L226 Difference]: Without dead ends: 49 [2021-02-21 16:08:25,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-21 16:08:25,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-02-21 16:08:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-21 16:08:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-02-21 16:08:25,260 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-02-21 16:08:25,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,260 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-02-21 16:08:25,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,261 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-02-21 16:08:25,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:25,262 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:25,263 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1660239210, now seen corresponding path program 1 times [2021-02-21 16:08:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2340043] [2021-02-21 16:08:25,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,352 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:25,366 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,367 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2340043] [2021-02-21 16:08:25,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079061976] [2021-02-21 16:08:25,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,450 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand 4 states. [2021-02-21 16:08:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,630 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-02-21 16:08:25,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,634 INFO L225 Difference]: With dead ends: 73 [2021-02-21 16:08:25,634 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 16:08:25,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 16:08:25,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-21 16:08:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-21 16:08:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-02-21 16:08:25,662 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-02-21 16:08:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,662 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-02-21 16:08:25,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-02-21 16:08:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:25,665 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:25,666 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2053266220, now seen corresponding path program 1 times [2021-02-21 16:08:25,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556697695] [2021-02-21 16:08:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,743 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:25,747 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:25,798 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:25,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:25,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556697695] [2021-02-21 16:08:25,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:25,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:25,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585695796] [2021-02-21 16:08:25,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:25,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:25,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:25,808 INFO L87 Difference]: Start difference. First operand 50 states and 80 transitions. Second operand 4 states. [2021-02-21 16:08:25,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:25,942 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-02-21 16:08:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:25,943 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:25,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:25,948 INFO L225 Difference]: With dead ends: 130 [2021-02-21 16:08:25,948 INFO L226 Difference]: Without dead ends: 89 [2021-02-21 16:08:25,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:25,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-21 16:08:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-02-21 16:08:25,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-21 16:08:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-02-21 16:08:25,974 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-02-21 16:08:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:25,975 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-02-21 16:08:25,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-02-21 16:08:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-21 16:08:25,977 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:25,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:25,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:25,979 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1561642706, now seen corresponding path program 1 times [2021-02-21 16:08:25,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:25,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551416581] [2021-02-21 16:08:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,026 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,026 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,027 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,058 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,059 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551416581] [2021-02-21 16:08:26,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836186558] [2021-02-21 16:08:26,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,063 INFO L87 Difference]: Start difference. First operand 87 states and 141 transitions. Second operand 4 states. [2021-02-21 16:08:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,173 INFO L93 Difference]: Finished difference Result 111 states and 179 transitions. [2021-02-21 16:08:26,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-21 16:08:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,175 INFO L225 Difference]: With dead ends: 111 [2021-02-21 16:08:26,176 INFO L226 Difference]: Without dead ends: 109 [2021-02-21 16:08:26,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-21 16:08:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-02-21 16:08:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-21 16:08:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-02-21 16:08:26,185 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-02-21 16:08:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,186 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-02-21 16:08:26,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-02-21 16:08:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:26,187 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:26,188 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,188 INFO L82 PathProgramCache]: Analyzing trace with hash 773471640, now seen corresponding path program 1 times [2021-02-21 16:08:26,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758929376] [2021-02-21 16:08:26,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,208 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,208 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,213 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,241 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758929376] [2021-02-21 16:08:26,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389697505] [2021-02-21 16:08:26,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,245 INFO L87 Difference]: Start difference. First operand 87 states and 139 transitions. Second operand 4 states. [2021-02-21 16:08:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,371 INFO L93 Difference]: Finished difference Result 155 states and 251 transitions. [2021-02-21 16:08:26,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,373 INFO L225 Difference]: With dead ends: 155 [2021-02-21 16:08:26,373 INFO L226 Difference]: Without dead ends: 153 [2021-02-21 16:08:26,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-21 16:08:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-02-21 16:08:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-02-21 16:08:26,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-02-21 16:08:26,386 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-02-21 16:08:26,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,386 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-02-21 16:08:26,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,387 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-02-21 16:08:26,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:26,388 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,388 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:26,389 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1453530010, now seen corresponding path program 1 times [2021-02-21 16:08:26,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241179451] [2021-02-21 16:08:26,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,410 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,411 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,412 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,443 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241179451] [2021-02-21 16:08:26,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560269416] [2021-02-21 16:08:26,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,448 INFO L87 Difference]: Start difference. First operand 119 states and 189 transitions. Second operand 4 states. [2021-02-21 16:08:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,548 INFO L93 Difference]: Finished difference Result 271 states and 435 transitions. [2021-02-21 16:08:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,549 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,551 INFO L225 Difference]: With dead ends: 271 [2021-02-21 16:08:26,551 INFO L226 Difference]: Without dead ends: 161 [2021-02-21 16:08:26,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-21 16:08:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-02-21 16:08:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-02-21 16:08:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-02-21 16:08:26,565 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-02-21 16:08:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,565 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-02-21 16:08:26,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-02-21 16:08:26,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:26,567 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1791967575, now seen corresponding path program 1 times [2021-02-21 16:08:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769220271] [2021-02-21 16:08:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,587 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,587 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,588 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:26,591 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,592 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769220271] [2021-02-21 16:08:26,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896723961] [2021-02-21 16:08:26,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,622 INFO L87 Difference]: Start difference. First operand 159 states and 247 transitions. Second operand 4 states. [2021-02-21 16:08:26,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,713 INFO L93 Difference]: Finished difference Result 241 states and 373 transitions. [2021-02-21 16:08:26,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:26,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,715 INFO L225 Difference]: With dead ends: 241 [2021-02-21 16:08:26,716 INFO L226 Difference]: Without dead ends: 167 [2021-02-21 16:08:26,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-21 16:08:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-02-21 16:08:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-02-21 16:08:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-02-21 16:08:26,728 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-02-21 16:08:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,728 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-02-21 16:08:26,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-02-21 16:08:26,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,729 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,730 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:26,730 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,731 INFO L82 PathProgramCache]: Analyzing trace with hash 2109972711, now seen corresponding path program 1 times [2021-02-21 16:08:26,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262149951] [2021-02-21 16:08:26,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,781 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262149951] [2021-02-21 16:08:26,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707496977] [2021-02-21 16:08:26,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,785 INFO L87 Difference]: Start difference. First operand 165 states and 251 transitions. Second operand 4 states. [2021-02-21 16:08:26,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:26,920 INFO L93 Difference]: Finished difference Result 285 states and 437 transitions. [2021-02-21 16:08:26,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:26,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:26,923 INFO L225 Difference]: With dead ends: 285 [2021-02-21 16:08:26,923 INFO L226 Difference]: Without dead ends: 283 [2021-02-21 16:08:26,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-02-21 16:08:26,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-02-21 16:08:26,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2021-02-21 16:08:26,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-02-21 16:08:26,936 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-02-21 16:08:26,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:26,936 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-02-21 16:08:26,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:26,937 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-02-21 16:08:26,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:26,938 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:26,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:26,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:26,938 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:26,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1504936215, now seen corresponding path program 1 times [2021-02-21 16:08:26,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:26,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896486116] [2021-02-21 16:08:26,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:26,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:26,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:26,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:26,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896486116] [2021-02-21 16:08:26,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:26,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252574598] [2021-02-21 16:08:26,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:26,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:26,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:26,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:26,998 INFO L87 Difference]: Start difference. First operand 233 states and 347 transitions. Second operand 4 states. [2021-02-21 16:08:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,108 INFO L93 Difference]: Finished difference Result 525 states and 781 transitions. [2021-02-21 16:08:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,111 INFO L225 Difference]: With dead ends: 525 [2021-02-21 16:08:27,111 INFO L226 Difference]: Without dead ends: 307 [2021-02-21 16:08:27,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-02-21 16:08:27,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-02-21 16:08:27,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2021-02-21 16:08:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-02-21 16:08:27,129 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-02-21 16:08:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,129 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-02-21 16:08:27,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-02-21 16:08:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:27,131 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:27,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:27,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:27,131 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 984860303, now seen corresponding path program 1 times [2021-02-21 16:08:27,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:27,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454100196] [2021-02-21 16:08:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:27,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,154 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,155 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:27,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:27,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454100196] [2021-02-21 16:08:27,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:27,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:27,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183192841] [2021-02-21 16:08:27,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:27,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:27,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:27,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:27,192 INFO L87 Difference]: Start difference. First operand 305 states and 439 transitions. Second operand 4 states. [2021-02-21 16:08:27,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,302 INFO L93 Difference]: Finished difference Result 457 states and 653 transitions. [2021-02-21 16:08:27,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:27,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,305 INFO L225 Difference]: With dead ends: 457 [2021-02-21 16:08:27,305 INFO L226 Difference]: Without dead ends: 315 [2021-02-21 16:08:27,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-02-21 16:08:27,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-02-21 16:08:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2021-02-21 16:08:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-02-21 16:08:27,321 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-02-21 16:08:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,322 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-02-21 16:08:27,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-02-21 16:08:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:27,323 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:27,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:27,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:27,323 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 591833293, now seen corresponding path program 1 times [2021-02-21 16:08:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:27,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615914700] [2021-02-21 16:08:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,353 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,354 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:27,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:27,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:27,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615914700] [2021-02-21 16:08:27,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:27,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:27,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604879547] [2021-02-21 16:08:27,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:27,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:27,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:27,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:27,393 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand 4 states. [2021-02-21 16:08:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,505 INFO L93 Difference]: Finished difference Result 525 states and 737 transitions. [2021-02-21 16:08:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,506 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,509 INFO L225 Difference]: With dead ends: 525 [2021-02-21 16:08:27,509 INFO L226 Difference]: Without dead ends: 523 [2021-02-21 16:08:27,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-02-21 16:08:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-02-21 16:08:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2021-02-21 16:08:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-02-21 16:08:27,542 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-02-21 16:08:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,542 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-02-21 16:08:27,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-02-21 16:08:27,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:27,544 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:27,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:27,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:27,544 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:27,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1271891663, now seen corresponding path program 1 times [2021-02-21 16:08:27,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:27,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994330922] [2021-02-21 16:08:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,559 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:27,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,594 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:27,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994330922] [2021-02-21 16:08:27,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:27,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:27,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86828419] [2021-02-21 16:08:27,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:27,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:27,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:27,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:27,598 INFO L87 Difference]: Start difference. First operand 457 states and 623 transitions. Second operand 4 states. [2021-02-21 16:08:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,706 INFO L93 Difference]: Finished difference Result 1021 states and 1377 transitions. [2021-02-21 16:08:27,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:27,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,710 INFO L225 Difference]: With dead ends: 1021 [2021-02-21 16:08:27,710 INFO L226 Difference]: Without dead ends: 587 [2021-02-21 16:08:27,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-02-21 16:08:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-02-21 16:08:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-02-21 16:08:27,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-02-21 16:08:27,738 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-02-21 16:08:27,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,739 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-02-21 16:08:27,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,739 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-02-21 16:08:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:27,740 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:27,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:27,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:27,741 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1167178942, now seen corresponding path program 1 times [2021-02-21 16:08:27,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:27,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675632547] [2021-02-21 16:08:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,757 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:27,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,792 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,792 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:27,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675632547] [2021-02-21 16:08:27,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:27,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:27,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441097943] [2021-02-21 16:08:27,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:27,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:27,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:27,795 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand 4 states. [2021-02-21 16:08:27,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:27,897 INFO L93 Difference]: Finished difference Result 877 states and 1129 transitions. [2021-02-21 16:08:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:27,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:27,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:27,900 INFO L225 Difference]: With dead ends: 877 [2021-02-21 16:08:27,901 INFO L226 Difference]: Without dead ends: 603 [2021-02-21 16:08:27,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:27,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-02-21 16:08:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-02-21 16:08:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2021-02-21 16:08:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-02-21 16:08:27,928 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-02-21 16:08:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:27,928 INFO L480 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-02-21 16:08:27,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-02-21 16:08:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:27,930 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:27,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:27,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:08:27,930 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:27,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash 774151932, now seen corresponding path program 1 times [2021-02-21 16:08:27,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:27,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927928610] [2021-02-21 16:08:27,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,945 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,946 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,947 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:27,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:27,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:27,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:27,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927928610] [2021-02-21 16:08:27,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:27,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:27,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272684607] [2021-02-21 16:08:27,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:27,980 INFO L87 Difference]: Start difference. First operand 601 states and 759 transitions. Second operand 4 states. [2021-02-21 16:08:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:28,107 INFO L93 Difference]: Finished difference Result 971 states and 1208 transitions. [2021-02-21 16:08:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:28,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:28,113 INFO L225 Difference]: With dead ends: 971 [2021-02-21 16:08:28,113 INFO L226 Difference]: Without dead ends: 969 [2021-02-21 16:08:28,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:28,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-02-21 16:08:28,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-02-21 16:08:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2021-02-21 16:08:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-02-21 16:08:28,149 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-02-21 16:08:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:28,150 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-02-21 16:08:28,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-02-21 16:08:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:28,152 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:28,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:28,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:08:28,152 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1454210302, now seen corresponding path program 1 times [2021-02-21 16:08:28,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:28,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781499884] [2021-02-21 16:08:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:28,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:28,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:28,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:28,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:08:28,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781499884] [2021-02-21 16:08:28,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:28,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:28,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535796629] [2021-02-21 16:08:28,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:28,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:28,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:28,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:28,205 INFO L87 Difference]: Start difference. First operand 905 states and 1111 transitions. Second operand 4 states. [2021-02-21 16:08:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:28,336 INFO L93 Difference]: Finished difference Result 1993 states and 2391 transitions. [2021-02-21 16:08:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:28,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:28,337 INFO L225 Difference]: With dead ends: 1993 [2021-02-21 16:08:28,337 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:28,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:08:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:28,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:28,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:28,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:28,342 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-02-21 16:08:28,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:28,342 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:28,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:28,342 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:28,342 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:28,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:08:28,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:08:29,195 WARN L202 SmtUtils]: Spent 834.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 32 [2021-02-21 16:08:29,232 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:08:29,232 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:08:29,232 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:08:29,233 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:29,233 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-02-21 16:08:29,233 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:29,233 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:29,233 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:08:29,233 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:08:29,233 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L85(line 85) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L95(line 95) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2021-02-21 16:08:29,234 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 107) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L80(line 80) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L192 CegarLoopUtils]: At program point L105(lines 7 109) the Hoare annotation is: true [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,235 INFO L189 CegarLoopUtils]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L90(line 90) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L192 CegarLoopUtils]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L75(line 75) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L100(line 100) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L185 CegarLoopUtils]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,236 INFO L189 CegarLoopUtils]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2021-02-21 16:08:29,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:08:29 BoogieIcfgContainer [2021-02-21 16:08:29,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:08:29,249 INFO L168 Benchmark]: Toolchain (without parser) took 6119.89 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 127.4 MB in the beginning and 168.3 MB in the end (delta: -40.9 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:29,250 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:08:29,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:29,251 INFO L168 Benchmark]: Boogie Preprocessor took 40.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:29,251 INFO L168 Benchmark]: RCFGBuilder took 451.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 131.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:29,252 INFO L168 Benchmark]: TraceAbstraction took 5329.12 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.2 MB in the beginning and 168.3 MB in the end (delta: -37.1 MB). Peak memory consumption was 123.3 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:29,253 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory is still 122.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 275.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 114.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 451.38 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 131.7 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5329.12 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 131.2 MB in the beginning and 168.3 MB in the end (delta: -37.1 MB). Peak memory consumption was 123.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 107]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.3s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 878 SDtfs, 1224 SDslu, 100 SDs, 0 SdLazy, 644 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=905occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 212294 FormulaSimplificationTreeSizeReduction, 0.8s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 299 ConstructedInterpolants, 0 QuantifiedInterpolants, 18875 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...