/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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:08:30,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:08:30,282 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:08:30,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:08:30,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:08:30,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:08:30,349 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:08:30,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:08:30,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:08:30,371 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:08:30,372 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:08:30,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:08:30,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:08:30,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:08:30,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:08:30,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:08:30,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:08:30,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:08:30,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:08:30,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:08:30,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:08:30,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:08:30,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:08:30,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:08:30,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:08:30,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:08:30,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:08:30,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:08:30,440 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 16:08:30,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:08:30,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:08:30,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:08:30,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:08:30,490 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:08:30,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:08:30,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:08:30,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:08:30,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:08:30,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:08:30,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:08:30,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:08:30,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:08:30,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:08:30,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:08:30,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:08:30,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:08:30,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:08:30,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:08:30,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:08:30,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:08:30,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:08:30,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:08:30,494 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:08:30,494 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:08:30,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:08:30,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:08:30,495 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:08:30,495 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:08:30,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:08:30,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:08:30,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:08:30,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:08:30,896 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:08:30,897 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2021-02-21 16:08:30,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89d829f0/3651e706628a42d58b57cf9af5fe4f0c/FLAGdbbbc2c54 [2021-02-21 16:08:31,692 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:08:31,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_8.c [2021-02-21 16:08:31,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89d829f0/3651e706628a42d58b57cf9af5fe4f0c/FLAGdbbbc2c54 [2021-02-21 16:08:32,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c89d829f0/3651e706628a42d58b57cf9af5fe4f0c [2021-02-21 16:08:32,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:08:32,042 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:08:32,044 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:32,044 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:08:32,048 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:08:32,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47b029e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32, skipping insertion in model container [2021-02-21 16:08:32,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:08:32,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:08:32,239 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_8.c[3218,3231] [2021-02-21 16:08:32,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:32,256 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:08:32,282 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_8.c[3218,3231] [2021-02-21 16:08:32,283 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:08:32,300 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:08:32,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32 WrapperNode [2021-02-21 16:08:32,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:08:32,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:08:32,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:08:32,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:08:32,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (1/1) ... [2021-02-21 16:08:32,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:08:32,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:08:32,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:08:32,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:08:32,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (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 16:08:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:08:32,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:08:32,471 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:08:32,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:08:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:08:32,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:08:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:08:32,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:08:32,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:08:32,473 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:08:32,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:08:32,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:08:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:08:32,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:08:32,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:08:32,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:08:33,031 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:08:33,031 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 16:08:33,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:33 BoogieIcfgContainer [2021-02-21 16:08:33,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:08:33,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:08:33,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:08:33,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:08:33,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:08:32" (1/3) ... [2021-02-21 16:08:33,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e661d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:33, skipping insertion in model container [2021-02-21 16:08:33,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:08:32" (2/3) ... [2021-02-21 16:08:33,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e661d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:08:33, skipping insertion in model container [2021-02-21 16:08:33,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:08:33" (3/3) ... [2021-02-21 16:08:33,061 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2021-02-21 16:08:33,070 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:08:33,076 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:08:33,100 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:08:33,149 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:08:33,149 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:08:33,150 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:08:33,150 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:08:33,150 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:08:33,150 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:08:33,150 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:08:33,151 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:08:33,181 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2021-02-21 16:08:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:33,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:33,193 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 16:08:33,193 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 957163615, now seen corresponding path program 1 times [2021-02-21 16:08:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:33,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686985065] [2021-02-21 16:08:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,504 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:33,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:33,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:33,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:33,625 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 16:08:33,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686985065] [2021-02-21 16:08:33,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:33,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319159529] [2021-02-21 16:08:33,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:33,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:33,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:33,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:33,650 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 4 states. [2021-02-21 16:08:34,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,053 INFO L93 Difference]: Finished difference Result 76 states and 127 transitions. [2021-02-21 16:08:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,056 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,068 INFO L225 Difference]: With dead ends: 76 [2021-02-21 16:08:34,068 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 16:08:34,072 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 16:08:34,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 16:08:34,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2021-02-21 16:08:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 16:08:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 74 transitions. [2021-02-21 16:08:34,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 74 transitions. Word has length 19 [2021-02-21 16:08:34,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,123 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 74 transitions. [2021-02-21 16:08:34,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 74 transitions. [2021-02-21 16:08:34,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:08:34,125 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,125 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 16:08:34,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:08:34,125 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1658228193, now seen corresponding path program 1 times [2021-02-21 16:08:34,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626148913] [2021-02-21 16:08:34,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:34,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,180 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,181 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:34,192 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,254 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 16:08:34,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626148913] [2021-02-21 16:08:34,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:34,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:34,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173229914] [2021-02-21 16:08:34,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:34,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:34,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:34,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:34,259 INFO L87 Difference]: Start difference. First operand 43 states and 74 transitions. Second operand 4 states. [2021-02-21 16:08:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,559 INFO L93 Difference]: Finished difference Result 98 states and 173 transitions. [2021-02-21 16:08:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-21 16:08:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,561 INFO L225 Difference]: With dead ends: 98 [2021-02-21 16:08:34,562 INFO L226 Difference]: Without dead ends: 61 [2021-02-21 16:08:34,563 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 16:08:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-02-21 16:08:34,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-02-21 16:08:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 16:08:34,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 102 transitions. [2021-02-21 16:08:34,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 102 transitions. Word has length 19 [2021-02-21 16:08:34,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,595 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 102 transitions. [2021-02-21 16:08:34,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 102 transitions. [2021-02-21 16:08:34,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:34,596 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,596 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 16:08:34,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:08:34,597 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,597 INFO L82 PathProgramCache]: Analyzing trace with hash -392484976, now seen corresponding path program 1 times [2021-02-21 16:08:34,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000835184] [2021-02-21 16:08:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,639 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:34,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:34,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:34,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:34,705 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 16:08:34,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000835184] [2021-02-21 16:08:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939147868] [2021-02-21 16:08:34,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:34,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:34,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:34,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:34,708 INFO L87 Difference]: Start difference. First operand 59 states and 102 transitions. Second operand 4 states. [2021-02-21 16:08:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:34,929 INFO L93 Difference]: Finished difference Result 91 states and 154 transitions. [2021-02-21 16:08:34,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:34,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:34,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:34,932 INFO L225 Difference]: With dead ends: 91 [2021-02-21 16:08:34,932 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 16:08:34,933 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 16:08:34,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 16:08:34,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2021-02-21 16:08:34,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-02-21 16:08:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 104 transitions. [2021-02-21 16:08:34,955 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 104 transitions. Word has length 20 [2021-02-21 16:08:34,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:34,955 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 104 transitions. [2021-02-21 16:08:34,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:34,956 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2021-02-21 16:08:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:34,959 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:34,959 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 16:08:34,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:08:34,960 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash -134319538, now seen corresponding path program 1 times [2021-02-21 16:08:34,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:34,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865951768] [2021-02-21 16:08:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:34,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,005 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:35,013 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,014 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,073 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,075 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 16:08:35,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865951768] [2021-02-21 16:08:35,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:35,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:35,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465713994] [2021-02-21 16:08:35,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:35,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:35,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:35,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:35,078 INFO L87 Difference]: Start difference. First operand 62 states and 104 transitions. Second operand 4 states. [2021-02-21 16:08:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:35,320 INFO L93 Difference]: Finished difference Result 166 states and 288 transitions. [2021-02-21 16:08:35,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:35,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:35,330 INFO L225 Difference]: With dead ends: 166 [2021-02-21 16:08:35,330 INFO L226 Difference]: Without dead ends: 113 [2021-02-21 16:08:35,332 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 16:08:35,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-21 16:08:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-02-21 16:08:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-21 16:08:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 189 transitions. [2021-02-21 16:08:35,367 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 189 transitions. Word has length 20 [2021-02-21 16:08:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:35,368 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 189 transitions. [2021-02-21 16:08:35,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 189 transitions. [2021-02-21 16:08:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 16:08:35,371 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:35,371 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 16:08:35,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:08:35,372 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash -835384116, now seen corresponding path program 1 times [2021-02-21 16:08:35,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:35,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491486067] [2021-02-21 16:08:35,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,425 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,426 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:35,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,537 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 16:08:35,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491486067] [2021-02-21 16:08:35,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:35,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:35,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271168115] [2021-02-21 16:08:35,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:35,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:35,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:35,542 INFO L87 Difference]: Start difference. First operand 111 states and 189 transitions. Second operand 4 states. [2021-02-21 16:08:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:35,803 INFO L93 Difference]: Finished difference Result 143 states and 243 transitions. [2021-02-21 16:08:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:35,804 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 16:08:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:35,806 INFO L225 Difference]: With dead ends: 143 [2021-02-21 16:08:35,806 INFO L226 Difference]: Without dead ends: 141 [2021-02-21 16:08:35,806 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 16:08:35,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-21 16:08:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2021-02-21 16:08:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-02-21 16:08:35,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 187 transitions. [2021-02-21 16:08:35,820 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 187 transitions. Word has length 20 [2021-02-21 16:08:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:35,821 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 187 transitions. [2021-02-21 16:08:35,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:35,821 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 187 transitions. [2021-02-21 16:08:35,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:35,823 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:35,823 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 16:08:35,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:08:35,823 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:35,824 INFO L82 PathProgramCache]: Analyzing trace with hash 131275990, now seen corresponding path program 1 times [2021-02-21 16:08:35,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:35,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130485660] [2021-02-21 16:08:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:35,865 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,866 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:35,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:35,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:35,959 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 16:08:35,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130485660] [2021-02-21 16:08:35,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:35,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:35,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418187424] [2021-02-21 16:08:35,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:35,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:35,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:35,963 INFO L87 Difference]: Start difference. First operand 111 states and 187 transitions. Second operand 4 states. [2021-02-21 16:08:36,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,178 INFO L93 Difference]: Finished difference Result 203 states and 347 transitions. [2021-02-21 16:08:36,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,183 INFO L225 Difference]: With dead ends: 203 [2021-02-21 16:08:36,183 INFO L226 Difference]: Without dead ends: 201 [2021-02-21 16:08:36,184 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 16:08:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-02-21 16:08:36,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 151. [2021-02-21 16:08:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-02-21 16:08:36,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 253 transitions. [2021-02-21 16:08:36,231 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 253 transitions. Word has length 21 [2021-02-21 16:08:36,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,231 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 253 transitions. [2021-02-21 16:08:36,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,231 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 253 transitions. [2021-02-21 16:08:36,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-21 16:08:36,236 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:36,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:08:36,237 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash 832340568, now seen corresponding path program 1 times [2021-02-21 16:08:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218036233] [2021-02-21 16:08:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:36,318 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,319 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,380 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,382 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 16:08:36,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218036233] [2021-02-21 16:08:36,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:36,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:36,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851259070] [2021-02-21 16:08:36,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:36,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:36,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:36,384 INFO L87 Difference]: Start difference. First operand 151 states and 253 transitions. Second operand 4 states. [2021-02-21 16:08:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,609 INFO L93 Difference]: Finished difference Result 351 states and 595 transitions. [2021-02-21 16:08:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,610 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-21 16:08:36,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,612 INFO L225 Difference]: With dead ends: 351 [2021-02-21 16:08:36,612 INFO L226 Difference]: Without dead ends: 209 [2021-02-21 16:08:36,613 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 16:08:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-02-21 16:08:36,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2021-02-21 16:08:36,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-02-21 16:08:36,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 343 transitions. [2021-02-21 16:08:36,628 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 343 transitions. Word has length 21 [2021-02-21 16:08:36,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,628 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 343 transitions. [2021-02-21 16:08:36,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 343 transitions. [2021-02-21 16:08:36,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:36,630 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,630 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 16:08:36,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:08:36,630 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -225196893, now seen corresponding path program 1 times [2021-02-21 16:08:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515598395] [2021-02-21 16:08:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,667 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,668 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:36,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,682 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:36,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:36,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:36,734 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 16:08:36,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515598395] [2021-02-21 16:08:36,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:36,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:36,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400767503] [2021-02-21 16:08:36,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:36,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:36,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:36,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:36,737 INFO L87 Difference]: Start difference. First operand 207 states and 343 transitions. Second operand 4 states. [2021-02-21 16:08:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:36,959 INFO L93 Difference]: Finished difference Result 313 states and 517 transitions. [2021-02-21 16:08:36,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:36,960 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:36,962 INFO L225 Difference]: With dead ends: 313 [2021-02-21 16:08:36,962 INFO L226 Difference]: Without dead ends: 215 [2021-02-21 16:08:36,963 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 16:08:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-02-21 16:08:36,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2021-02-21 16:08:36,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2021-02-21 16:08:36,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 347 transitions. [2021-02-21 16:08:36,977 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 347 transitions. Word has length 22 [2021-02-21 16:08:36,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:36,978 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 347 transitions. [2021-02-21 16:08:36,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:36,978 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 347 transitions. [2021-02-21 16:08:36,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:36,979 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:36,979 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 16:08:36,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:08:36,980 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:36,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:36,980 INFO L82 PathProgramCache]: Analyzing trace with hash 32968545, now seen corresponding path program 1 times [2021-02-21 16:08:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:36,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252470787] [2021-02-21 16:08:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,005 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:37,012 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,013 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,066 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,070 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 16:08:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252470787] [2021-02-21 16:08:37,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399465670] [2021-02-21 16:08:37,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,077 INFO L87 Difference]: Start difference. First operand 213 states and 347 transitions. Second operand 4 states. [2021-02-21 16:08:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,276 INFO L93 Difference]: Finished difference Result 381 states and 629 transitions. [2021-02-21 16:08:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,280 INFO L225 Difference]: With dead ends: 381 [2021-02-21 16:08:37,280 INFO L226 Difference]: Without dead ends: 379 [2021-02-21 16:08:37,281 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 16:08:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-02-21 16:08:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 297. [2021-02-21 16:08:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2021-02-21 16:08:37,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 475 transitions. [2021-02-21 16:08:37,296 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 475 transitions. Word has length 22 [2021-02-21 16:08:37,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,296 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 475 transitions. [2021-02-21 16:08:37,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,297 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 475 transitions. [2021-02-21 16:08:37,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-21 16:08:37,298 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,298 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 16:08:37,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:08:37,299 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,299 INFO L82 PathProgramCache]: Analyzing trace with hash 734033123, now seen corresponding path program 1 times [2021-02-21 16:08:37,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194901849] [2021-02-21 16:08:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,327 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:37,332 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,378 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,379 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,380 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 16:08:37,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194901849] [2021-02-21 16:08:37,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201494066] [2021-02-21 16:08:37,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,383 INFO L87 Difference]: Start difference. First operand 297 states and 475 transitions. Second operand 4 states. [2021-02-21 16:08:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,596 INFO L93 Difference]: Finished difference Result 685 states and 1101 transitions. [2021-02-21 16:08:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-21 16:08:37,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,600 INFO L225 Difference]: With dead ends: 685 [2021-02-21 16:08:37,600 INFO L226 Difference]: Without dead ends: 403 [2021-02-21 16:08:37,605 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 16:08:37,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-21 16:08:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 401. [2021-02-21 16:08:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2021-02-21 16:08:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 631 transitions. [2021-02-21 16:08:37,630 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 631 transitions. Word has length 22 [2021-02-21 16:08:37,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,633 INFO L480 AbstractCegarLoop]: Abstraction has 401 states and 631 transitions. [2021-02-21 16:08:37,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 631 transitions. [2021-02-21 16:08:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:37,638 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:37,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:08:37,640 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1022239949, now seen corresponding path program 1 times [2021-02-21 16:08:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689738942] [2021-02-21 16:08:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:37,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,693 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:37,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:37,756 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:37,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:37,758 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 16:08:37,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689738942] [2021-02-21 16:08:37,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:37,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:37,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070912490] [2021-02-21 16:08:37,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:37,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:37,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:37,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:37,760 INFO L87 Difference]: Start difference. First operand 401 states and 631 transitions. Second operand 4 states. [2021-02-21 16:08:37,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:37,971 INFO L93 Difference]: Finished difference Result 601 states and 941 transitions. [2021-02-21 16:08:37,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:37,971 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:37,974 INFO L225 Difference]: With dead ends: 601 [2021-02-21 16:08:37,974 INFO L226 Difference]: Without dead ends: 411 [2021-02-21 16:08:37,975 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 16:08:37,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-02-21 16:08:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 409. [2021-02-21 16:08:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 409 states. [2021-02-21 16:08:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 631 transitions. [2021-02-21 16:08:37,994 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 631 transitions. Word has length 23 [2021-02-21 16:08:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:37,995 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 631 transitions. [2021-02-21 16:08:37,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:37,995 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 631 transitions. [2021-02-21 16:08:37,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:37,996 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:37,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:37,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:08:37,996 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1280405387, now seen corresponding path program 1 times [2021-02-21 16:08:37,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:37,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406211239] [2021-02-21 16:08:37,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,018 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,019 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:38,025 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,075 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,076 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,077 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 16:08:38,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406211239] [2021-02-21 16:08:38,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977331765] [2021-02-21 16:08:38,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,079 INFO L87 Difference]: Start difference. First operand 409 states and 631 transitions. Second operand 4 states. [2021-02-21 16:08:38,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,276 INFO L93 Difference]: Finished difference Result 717 states and 1121 transitions. [2021-02-21 16:08:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,286 INFO L225 Difference]: With dead ends: 717 [2021-02-21 16:08:38,286 INFO L226 Difference]: Without dead ends: 715 [2021-02-21 16:08:38,287 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 16:08:38,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-02-21 16:08:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 585. [2021-02-21 16:08:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-02-21 16:08:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 879 transitions. [2021-02-21 16:08:38,317 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 879 transitions. Word has length 23 [2021-02-21 16:08:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,318 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 879 transitions. [2021-02-21 16:08:38,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 879 transitions. [2021-02-21 16:08:38,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-21 16:08:38,321 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,321 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:38,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:08:38,322 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1981469965, now seen corresponding path program 1 times [2021-02-21 16:08:38,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874732873] [2021-02-21 16:08:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,356 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:38,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,372 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,417 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,421 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 16:08:38,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874732873] [2021-02-21 16:08:38,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152542633] [2021-02-21 16:08:38,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,423 INFO L87 Difference]: Start difference. First operand 585 states and 879 transitions. Second operand 4 states. [2021-02-21 16:08:38,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:38,655 INFO L93 Difference]: Finished difference Result 1341 states and 2017 transitions. [2021-02-21 16:08:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:38,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-21 16:08:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:38,661 INFO L225 Difference]: With dead ends: 1341 [2021-02-21 16:08:38,661 INFO L226 Difference]: Without dead ends: 779 [2021-02-21 16:08:38,664 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 16:08:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-02-21 16:08:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 777. [2021-02-21 16:08:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2021-02-21 16:08:38,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 1143 transitions. [2021-02-21 16:08:38,704 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 1143 transitions. Word has length 23 [2021-02-21 16:08:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:38,704 INFO L480 AbstractCegarLoop]: Abstraction has 777 states and 1143 transitions. [2021-02-21 16:08:38,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 1143 transitions. [2021-02-21 16:08:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:38,707 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:38,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:38,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-21 16:08:38,707 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1038076728, now seen corresponding path program 1 times [2021-02-21 16:08:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:38,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821986805] [2021-02-21 16:08:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:38,758 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:38,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:38,813 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:38,815 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 16:08:38,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821986805] [2021-02-21 16:08:38,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:38,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:38,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936275073] [2021-02-21 16:08:38,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:38,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:38,818 INFO L87 Difference]: Start difference. First operand 777 states and 1143 transitions. Second operand 4 states. [2021-02-21 16:08:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,018 INFO L93 Difference]: Finished difference Result 1165 states and 1705 transitions. [2021-02-21 16:08:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,018 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,023 INFO L225 Difference]: With dead ends: 1165 [2021-02-21 16:08:39,023 INFO L226 Difference]: Without dead ends: 795 [2021-02-21 16:08:39,025 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 16:08:39,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-02-21 16:08:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 793. [2021-02-21 16:08:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 793 states. [2021-02-21 16:08:39,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 1143 transitions. [2021-02-21 16:08:39,063 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 1143 transitions. Word has length 24 [2021-02-21 16:08:39,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,063 INFO L480 AbstractCegarLoop]: Abstraction has 793 states and 1143 transitions. [2021-02-21 16:08:39,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,063 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 1143 transitions. [2021-02-21 16:08:39,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:39,065 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-21 16:08:39,065 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1296242166, now seen corresponding path program 1 times [2021-02-21 16:08:39,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575805025] [2021-02-21 16:08:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,084 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:39,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,137 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,138 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,139 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 16:08:39,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575805025] [2021-02-21 16:08:39,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5915885] [2021-02-21 16:08:39,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,142 INFO L87 Difference]: Start difference. First operand 793 states and 1143 transitions. Second operand 4 states. [2021-02-21 16:08:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,355 INFO L93 Difference]: Finished difference Result 1357 states and 1977 transitions. [2021-02-21 16:08:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,356 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,363 INFO L225 Difference]: With dead ends: 1357 [2021-02-21 16:08:39,363 INFO L226 Difference]: Without dead ends: 1355 [2021-02-21 16:08:39,364 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 16:08:39,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-02-21 16:08:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1161. [2021-02-21 16:08:39,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2021-02-21 16:08:39,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1623 transitions. [2021-02-21 16:08:39,413 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1623 transitions. Word has length 24 [2021-02-21 16:08:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,413 INFO L480 AbstractCegarLoop]: Abstraction has 1161 states and 1623 transitions. [2021-02-21 16:08:39,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1623 transitions. [2021-02-21 16:08:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:08:39,415 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-21 16:08:39,416 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1997306744, now seen corresponding path program 1 times [2021-02-21 16:08:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593629082] [2021-02-21 16:08:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,434 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,435 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,436 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:39,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,512 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 16:08:39,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593629082] [2021-02-21 16:08:39,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779628530] [2021-02-21 16:08:39,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,518 INFO L87 Difference]: Start difference. First operand 1161 states and 1623 transitions. Second operand 4 states. [2021-02-21 16:08:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:39,760 INFO L93 Difference]: Finished difference Result 2637 states and 3673 transitions. [2021-02-21 16:08:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:39,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-21 16:08:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:39,770 INFO L225 Difference]: With dead ends: 2637 [2021-02-21 16:08:39,770 INFO L226 Difference]: Without dead ends: 1515 [2021-02-21 16:08:39,773 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 16:08:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-02-21 16:08:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1513. [2021-02-21 16:08:39,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1513 states. [2021-02-21 16:08:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 2055 transitions. [2021-02-21 16:08:39,847 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 2055 transitions. Word has length 24 [2021-02-21 16:08:39,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:39,849 INFO L480 AbstractCegarLoop]: Abstraction has 1513 states and 2055 transitions. [2021-02-21 16:08:39,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 2055 transitions. [2021-02-21 16:08:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:39,852 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:39,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:39,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-21 16:08:39,852 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1529017218, now seen corresponding path program 1 times [2021-02-21 16:08:39,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:39,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664642363] [2021-02-21 16:08:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:39,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:39,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:39,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:39,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:39,940 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 16:08:39,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664642363] [2021-02-21 16:08:39,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:39,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:39,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878066346] [2021-02-21 16:08:39,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:39,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:39,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:39,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:39,946 INFO L87 Difference]: Start difference. First operand 1513 states and 2055 transitions. Second operand 4 states. [2021-02-21 16:08:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:40,161 INFO L93 Difference]: Finished difference Result 2269 states and 3065 transitions. [2021-02-21 16:08:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:40,161 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:40,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:40,171 INFO L225 Difference]: With dead ends: 2269 [2021-02-21 16:08:40,172 INFO L226 Difference]: Without dead ends: 1547 [2021-02-21 16:08:40,175 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 16:08:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-02-21 16:08:40,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1545. [2021-02-21 16:08:40,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2021-02-21 16:08:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 2055 transitions. [2021-02-21 16:08:40,244 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 2055 transitions. Word has length 25 [2021-02-21 16:08:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:40,245 INFO L480 AbstractCegarLoop]: Abstraction has 1545 states and 2055 transitions. [2021-02-21 16:08:40,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 2055 transitions. [2021-02-21 16:08:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:40,247 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:40,248 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:40,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-21 16:08:40,248 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:40,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1787182656, now seen corresponding path program 1 times [2021-02-21 16:08:40,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:40,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391904560] [2021-02-21 16:08:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,293 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:40,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,343 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,344 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,345 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 16:08:40,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391904560] [2021-02-21 16:08:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:40,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:40,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470285171] [2021-02-21 16:08:40,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:40,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:40,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:40,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:40,349 INFO L87 Difference]: Start difference. First operand 1545 states and 2055 transitions. Second operand 4 states. [2021-02-21 16:08:40,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:40,611 INFO L93 Difference]: Finished difference Result 2573 states and 3433 transitions. [2021-02-21 16:08:40,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:40,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:40,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:40,626 INFO L225 Difference]: With dead ends: 2573 [2021-02-21 16:08:40,626 INFO L226 Difference]: Without dead ends: 2571 [2021-02-21 16:08:40,628 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 16:08:40,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-02-21 16:08:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2313. [2021-02-21 16:08:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2313 states. [2021-02-21 16:08:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2983 transitions. [2021-02-21 16:08:40,720 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2983 transitions. Word has length 25 [2021-02-21 16:08:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:40,721 INFO L480 AbstractCegarLoop]: Abstraction has 2313 states and 2983 transitions. [2021-02-21 16:08:40,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2983 transitions. [2021-02-21 16:08:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-21 16:08:40,725 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:40,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:40,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-21 16:08:40,726 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:40,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:40,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1806720062, now seen corresponding path program 1 times [2021-02-21 16:08:40,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:40,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628668699] [2021-02-21 16:08:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,750 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:40,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:40,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:40,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:40,804 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 16:08:40,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628668699] [2021-02-21 16:08:40,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:40,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891769429] [2021-02-21 16:08:40,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:40,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:40,808 INFO L87 Difference]: Start difference. First operand 2313 states and 2983 transitions. Second operand 4 states. [2021-02-21 16:08:41,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:41,081 INFO L93 Difference]: Finished difference Result 5197 states and 6633 transitions. [2021-02-21 16:08:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:41,082 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-21 16:08:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:41,095 INFO L225 Difference]: With dead ends: 5197 [2021-02-21 16:08:41,095 INFO L226 Difference]: Without dead ends: 2955 [2021-02-21 16:08:41,100 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 16:08:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-02-21 16:08:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2953. [2021-02-21 16:08:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2953 states. [2021-02-21 16:08:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2953 states to 2953 states and 3655 transitions. [2021-02-21 16:08:41,223 INFO L78 Accepts]: Start accepts. Automaton has 2953 states and 3655 transitions. Word has length 25 [2021-02-21 16:08:41,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:41,223 INFO L480 AbstractCegarLoop]: Abstraction has 2953 states and 3655 transitions. [2021-02-21 16:08:41,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2953 states and 3655 transitions. [2021-02-21 16:08:41,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:41,228 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:41,228 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:41,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-21 16:08:41,228 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:41,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:41,229 INFO L82 PathProgramCache]: Analyzing trace with hash -431696435, now seen corresponding path program 1 times [2021-02-21 16:08:41,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:41,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248999923] [2021-02-21 16:08:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,247 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:08:41,252 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,253 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,295 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,297 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 16:08:41,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248999923] [2021-02-21 16:08:41,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:41,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:41,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888533812] [2021-02-21 16:08:41,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:41,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:41,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:41,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:41,299 INFO L87 Difference]: Start difference. First operand 2953 states and 3655 transitions. Second operand 4 states. [2021-02-21 16:08:41,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:41,529 INFO L93 Difference]: Finished difference Result 4429 states and 5449 transitions. [2021-02-21 16:08:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:41,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:41,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:41,544 INFO L225 Difference]: With dead ends: 4429 [2021-02-21 16:08:41,544 INFO L226 Difference]: Without dead ends: 3019 [2021-02-21 16:08:41,548 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 16:08:41,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-02-21 16:08:41,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3017. [2021-02-21 16:08:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3017 states. [2021-02-21 16:08:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3017 states to 3017 states and 3655 transitions. [2021-02-21 16:08:41,699 INFO L78 Accepts]: Start accepts. Automaton has 3017 states and 3655 transitions. Word has length 26 [2021-02-21 16:08:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:41,700 INFO L480 AbstractCegarLoop]: Abstraction has 3017 states and 3655 transitions. [2021-02-21 16:08:41,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3017 states and 3655 transitions. [2021-02-21 16:08:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:41,705 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:41,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:41,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-21 16:08:41,708 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash -173530997, now seen corresponding path program 1 times [2021-02-21 16:08:41,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:41,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883788108] [2021-02-21 16:08:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,752 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,752 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,753 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:41,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:41,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:41,808 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:41,809 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:41,810 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 16:08:41,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883788108] [2021-02-21 16:08:41,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:41,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:41,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601379418] [2021-02-21 16:08:41,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:41,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:41,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:41,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:41,813 INFO L87 Difference]: Start difference. First operand 3017 states and 3655 transitions. Second operand 4 states. [2021-02-21 16:08:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:42,098 INFO L93 Difference]: Finished difference Result 4875 states and 5832 transitions. [2021-02-21 16:08:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:42,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:42,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:42,123 INFO L225 Difference]: With dead ends: 4875 [2021-02-21 16:08:42,123 INFO L226 Difference]: Without dead ends: 4873 [2021-02-21 16:08:42,125 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 16:08:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4873 states. [2021-02-21 16:08:42,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4873 to 4617. [2021-02-21 16:08:42,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4617 states. [2021-02-21 16:08:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 5447 transitions. [2021-02-21 16:08:42,322 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 5447 transitions. Word has length 26 [2021-02-21 16:08:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:42,322 INFO L480 AbstractCegarLoop]: Abstraction has 4617 states and 5447 transitions. [2021-02-21 16:08:42,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:42,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 5447 transitions. [2021-02-21 16:08:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-21 16:08:42,332 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:08:42,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:08:42,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-21 16:08:42,333 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:08:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:08:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash 527533581, now seen corresponding path program 1 times [2021-02-21 16:08:42,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:08:42,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559760499] [2021-02-21 16:08:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:08:42,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:42,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,357 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:08:42,372 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:08:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:08:42,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:08:42,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:08:42,420 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 16:08:42,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559760499] [2021-02-21 16:08:42,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:08:42,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:08:42,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053596863] [2021-02-21 16:08:42,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:08:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:08:42,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:08:42,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:08:42,424 INFO L87 Difference]: Start difference. First operand 4617 states and 5447 transitions. Second operand 4 states. [2021-02-21 16:08:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:08:42,747 INFO L93 Difference]: Finished difference Result 10249 states and 11847 transitions. [2021-02-21 16:08:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:08:42,748 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-21 16:08:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:08:42,748 INFO L225 Difference]: With dead ends: 10249 [2021-02-21 16:08:42,748 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:08:42,765 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 16:08:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:08:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:08:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:08:42,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:08:42,766 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-02-21 16:08:42,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:08:42,767 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:08:42,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:08:42,767 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:08:42,767 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:08:42,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-21 16:08:42,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:08:49,180 WARN L202 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 1093 DAG size of output: 32 [2021-02-21 16:08:49,238 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:08:49,239 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:08:49,239 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:08:49,239 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:49,241 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 16:08:49,241 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:49,241 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:08:49,242 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:08:49,242 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L189 CegarLoopUtils]: For program point L93(line 93) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 137) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L189 CegarLoopUtils]: For program point L118(line 118) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L189 CegarLoopUtils]: For program point L102-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,242 INFO L192 CegarLoopUtils]: At program point L127-1(lines 35 132) the Hoare annotation is: true [2021-02-21 16:08:49,243 INFO L189 CegarLoopUtils]: For program point L86-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,245 INFO L189 CegarLoopUtils]: For program point L78-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,245 INFO L189 CegarLoopUtils]: For program point L103(line 103) no Hoare annotation was computed. [2021-02-21 16:08:49,245 INFO L189 CegarLoopUtils]: For program point L37(lines 37 39) no Hoare annotation was computed. [2021-02-21 16:08:49,245 INFO L189 CegarLoopUtils]: For program point L70-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,246 INFO L189 CegarLoopUtils]: For program point L128(line 128) no Hoare annotation was computed. [2021-02-21 16:08:49,246 INFO L185 CegarLoopUtils]: At program point L128-1(lines 7 137) the Hoare annotation is: false [2021-02-21 16:08:49,246 INFO L189 CegarLoopUtils]: For program point L62-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,246 INFO L189 CegarLoopUtils]: For program point L112-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 137) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 135) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 137) the Hoare annotation is: true [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L113(line 113) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L97-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L122-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L98(line 98) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L123(line 123) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L82-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,247 INFO L189 CegarLoopUtils]: For program point L107-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L74-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L66-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L58(lines 58 60) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L58-2(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L108(line 108) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L192 CegarLoopUtils]: At program point L133(lines 7 137) the Hoare annotation is: true [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L92-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,248 INFO L189 CegarLoopUtils]: For program point L117-1(lines 35 132) no Hoare annotation was computed. [2021-02-21 16:08:49,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:08:49 BoogieIcfgContainer [2021-02-21 16:08:49,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:08:49,262 INFO L168 Benchmark]: Toolchain (without parser) took 17230.10 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 126.1 MB in the beginning and 332.8 MB in the end (delta: -206.7 MB). Peak memory consumption was 224.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:49,262 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:08:49,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.86 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:49,263 INFO L168 Benchmark]: Boogie Preprocessor took 45.22 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:49,263 INFO L168 Benchmark]: RCFGBuilder took 691.45 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 127.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:49,264 INFO L168 Benchmark]: TraceAbstraction took 16218.79 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 127.0 MB in the beginning and 332.8 MB in the end (delta: -205.8 MB). Peak memory consumption was 225.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:08:49,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 151.0 MB. Free memory is still 123.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.86 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 115.1 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.22 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 113.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 691.45 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 127.5 MB in the end (delta: -14.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16218.79 ms. Allocated memory was 151.0 MB in the beginning and 453.0 MB in the end (delta: 302.0 MB). Free memory was 127.0 MB in the beginning and 332.8 MB in the end (delta: -205.8 MB). Peak memory consumption was 225.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 135]: 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: 35]: 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.6s, OverallIterations: 22, TraceHistogramMax: 1, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 6.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1542 SDtfs, 2238 SDslu, 136 SDs, 0 SdLazy, 1125 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4617occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 1044 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 3426278 FormulaSimplificationTreeSizeReduction, 6.4s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 500 NumberOfCodeBlocks, 500 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 478 ConstructedInterpolants, 0 QuantifiedInterpolants, 33900 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 22 InterpolantComputations, 22 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...