/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:34:19,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:34:19,265 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:34:19,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:34:19,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:34:19,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:34:19,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:34:19,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:34:19,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:34:19,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:34:19,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:34:19,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:34:19,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:34:19,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:34:19,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:34:19,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:34:19,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:34:19,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:34:19,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:34:19,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:34:19,431 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 [2021-02-23 13:34:19,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:34:19,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:34:19,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:34:19,490 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:34:19,490 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:34:19,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:34:19,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:34:19,491 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:34:19,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:34:19,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:34:19,492 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:34:19,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:34:19,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:34:19,493 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:34:19,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:34:19,493 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:34:19,494 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:34:19,494 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:34:19,494 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:34:19,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:34:19,495 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:19,495 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:34:19,495 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:34:19,496 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:34:19,496 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:34:19,496 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:34:19,496 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:34:19,496 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:34:19,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:34:19,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:34:20,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:34:20,017 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:34:20,019 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:34:20,020 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:34:20,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2021-02-23 13:34:20,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db43e73/569c69e12e8046b49a2cb04fbf481de8/FLAGab79560db [2021-02-23 13:34:20,819 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:34:20,820 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c [2021-02-23 13:34:20,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db43e73/569c69e12e8046b49a2cb04fbf481de8/FLAGab79560db [2021-02-23 13:34:21,166 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40db43e73/569c69e12e8046b49a2cb04fbf481de8 [2021-02-23 13:34:21,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:34:21,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:34:21,182 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:21,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:34:21,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:34:21,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb13d8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21, skipping insertion in model container [2021-02-23 13:34:21,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:34:21,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:34:21,377 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2021-02-23 13:34:21,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:21,391 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:34:21,414 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_6.c[2544,2557] [2021-02-23 13:34:21,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:21,431 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:34:21,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21 WrapperNode [2021-02-23 13:34:21,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:21,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:34:21,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:34:21,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:34:21,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... [2021-02-23 13:34:21,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:34:21,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:34:21,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:34:21,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:34:21,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:21,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:34:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:34:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:34:21,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:34:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:34:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:34:21,579 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:34:21,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:34:21,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:34:21,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:34:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:34:21,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:34:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:34:21,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:34:22,037 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:34:22,038 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:34:22,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:22 BoogieIcfgContainer [2021-02-23 13:34:22,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:34:22,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:34:22,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:34:22,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:34:22,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:34:21" (1/3) ... [2021-02-23 13:34:22,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d8b3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:22, skipping insertion in model container [2021-02-23 13:34:22,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:21" (2/3) ... [2021-02-23 13:34:22,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d8b3c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:22, skipping insertion in model container [2021-02-23 13:34:22,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:22" (3/3) ... [2021-02-23 13:34:22,063 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2021-02-23 13:34:22,082 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:34:22,089 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:34:22,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:34:22,165 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:34:22,165 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:34:22,165 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:34:22,165 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:34:22,166 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:34:22,166 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:34:22,166 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:34:22,166 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:34:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2021-02-23 13:34:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:34:22,201 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,203 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1747552289, now seen corresponding path program 1 times [2021-02-23 13:34:22,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823658819] [2021-02-23 13:34:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,548 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,552 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,552 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:22,585 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,585 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:22,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:22,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:22,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823658819] [2021-02-23 13:34:22,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:22,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:22,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857467428] [2021-02-23 13:34:22,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:22,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:22,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:22,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:22,672 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2021-02-23 13:34:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:22,865 INFO L93 Difference]: Finished difference Result 64 states and 103 transitions. [2021-02-23 13:34:22,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:22,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:34:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:22,879 INFO L225 Difference]: With dead ends: 64 [2021-02-23 13:34:22,879 INFO L226 Difference]: Without dead ends: 49 [2021-02-23 13:34:22,883 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 [2021-02-23 13:34:22,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-23 13:34:22,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-02-23 13:34:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-23 13:34:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2021-02-23 13:34:22,932 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 17 [2021-02-23 13:34:22,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:22,932 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 58 transitions. [2021-02-23 13:34:22,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 58 transitions. [2021-02-23 13:34:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:34:22,936 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:22,936 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:22,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:34:22,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:22,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1867356637, now seen corresponding path program 1 times [2021-02-23 13:34:22,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:22,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403267663] [2021-02-23 13:34:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,043 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,048 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,050 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,054 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,055 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403267663] [2021-02-23 13:34:23,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745768491] [2021-02-23 13:34:23,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,101 INFO L87 Difference]: Start difference. First operand 35 states and 58 transitions. Second operand 4 states. [2021-02-23 13:34:23,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,236 INFO L93 Difference]: Finished difference Result 78 states and 133 transitions. [2021-02-23 13:34:23,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:34:23,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,238 INFO L225 Difference]: With dead ends: 78 [2021-02-23 13:34:23,238 INFO L226 Difference]: Without dead ends: 49 [2021-02-23 13:34:23,240 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 [2021-02-23 13:34:23,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-02-23 13:34:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-02-23 13:34:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 13:34:23,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 78 transitions. [2021-02-23 13:34:23,252 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 78 transitions. Word has length 17 [2021-02-23 13:34:23,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,252 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 78 transitions. [2021-02-23 13:34:23,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 78 transitions. [2021-02-23 13:34:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:23,254 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:34:23,254 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1660239210, now seen corresponding path program 1 times [2021-02-23 13:34:23,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435755354] [2021-02-23 13:34:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,292 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,292 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:23,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,351 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435755354] [2021-02-23 13:34:23,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371825961] [2021-02-23 13:34:23,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,356 INFO L87 Difference]: Start difference. First operand 47 states and 78 transitions. Second operand 4 states. [2021-02-23 13:34:23,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,490 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2021-02-23 13:34:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,491 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:23,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,492 INFO L225 Difference]: With dead ends: 73 [2021-02-23 13:34:23,493 INFO L226 Difference]: Without dead ends: 52 [2021-02-23 13:34:23,493 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 [2021-02-23 13:34:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-23 13:34:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-02-23 13:34:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-02-23 13:34:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 80 transitions. [2021-02-23 13:34:23,504 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 80 transitions. Word has length 18 [2021-02-23 13:34:23,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,505 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 80 transitions. [2021-02-23 13:34:23,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 80 transitions. [2021-02-23 13:34:23,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:23,506 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:34:23,507 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2053266220, now seen corresponding path program 1 times [2021-02-23 13:34:23,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569413813] [2021-02-23 13:34:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,542 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,543 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,549 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,597 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,598 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569413813] [2021-02-23 13:34:23,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751586796] [2021-02-23 13:34:23,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,606 INFO L87 Difference]: Start difference. First operand 50 states and 80 transitions. Second operand 4 states. [2021-02-23 13:34:23,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,739 INFO L93 Difference]: Finished difference Result 130 states and 216 transitions. [2021-02-23 13:34:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,741 INFO L225 Difference]: With dead ends: 130 [2021-02-23 13:34:23,742 INFO L226 Difference]: Without dead ends: 89 [2021-02-23 13:34:23,743 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 [2021-02-23 13:34:23,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-02-23 13:34:23,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-02-23 13:34:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-23 13:34:23,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 141 transitions. [2021-02-23 13:34:23,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 141 transitions. Word has length 18 [2021-02-23 13:34:23,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,756 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 141 transitions. [2021-02-23 13:34:23,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,757 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 141 transitions. [2021-02-23 13:34:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:34:23,758 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:34:23,758 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1561642706, now seen corresponding path program 1 times [2021-02-23 13:34:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203321437] [2021-02-23 13:34:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,785 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,786 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,790 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:23,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203321437] [2021-02-23 13:34:23,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:23,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040730099] [2021-02-23 13:34:23,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:23,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:23,822 INFO L87 Difference]: Start difference. First operand 87 states and 141 transitions. Second operand 4 states. [2021-02-23 13:34:23,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:23,925 INFO L93 Difference]: Finished difference Result 111 states and 179 transitions. [2021-02-23 13:34:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:23,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-02-23 13:34:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:23,927 INFO L225 Difference]: With dead ends: 111 [2021-02-23 13:34:23,927 INFO L226 Difference]: Without dead ends: 109 [2021-02-23 13:34:23,928 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 [2021-02-23 13:34:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-02-23 13:34:23,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-02-23 13:34:23,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-02-23 13:34:23,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 139 transitions. [2021-02-23 13:34:23,940 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 139 transitions. Word has length 18 [2021-02-23 13:34:23,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:23,940 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 139 transitions. [2021-02-23 13:34:23,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 139 transitions. [2021-02-23 13:34:23,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:23,941 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:23,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:23,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:34:23,942 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash 773471640, now seen corresponding path program 1 times [2021-02-23 13:34:23,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:23,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852481100] [2021-02-23 13:34:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:23,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:23,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:23,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:23,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,002 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,003 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852481100] [2021-02-23 13:34:24,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231178531] [2021-02-23 13:34:24,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,019 INFO L87 Difference]: Start difference. First operand 87 states and 139 transitions. Second operand 4 states. [2021-02-23 13:34:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,121 INFO L93 Difference]: Finished difference Result 155 states and 251 transitions. [2021-02-23 13:34:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,124 INFO L225 Difference]: With dead ends: 155 [2021-02-23 13:34:24,124 INFO L226 Difference]: Without dead ends: 153 [2021-02-23 13:34:24,125 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 [2021-02-23 13:34:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-02-23 13:34:24,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 119. [2021-02-23 13:34:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-02-23 13:34:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 189 transitions. [2021-02-23 13:34:24,138 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 189 transitions. Word has length 19 [2021-02-23 13:34:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,139 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 189 transitions. [2021-02-23 13:34:24,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 189 transitions. [2021-02-23 13:34:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:34:24,141 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,141 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:24,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:34:24,142 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1453530010, now seen corresponding path program 1 times [2021-02-23 13:34:24,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183288015] [2021-02-23 13:34:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,166 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,170 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183288015] [2021-02-23 13:34:24,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157350604] [2021-02-23 13:34:24,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,203 INFO L87 Difference]: Start difference. First operand 119 states and 189 transitions. Second operand 4 states. [2021-02-23 13:34:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,295 INFO L93 Difference]: Finished difference Result 271 states and 435 transitions. [2021-02-23 13:34:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-02-23 13:34:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,297 INFO L225 Difference]: With dead ends: 271 [2021-02-23 13:34:24,297 INFO L226 Difference]: Without dead ends: 161 [2021-02-23 13:34:24,298 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 [2021-02-23 13:34:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-02-23 13:34:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2021-02-23 13:34:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-02-23 13:34:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 247 transitions. [2021-02-23 13:34:24,311 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 247 transitions. Word has length 19 [2021-02-23 13:34:24,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,312 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 247 transitions. [2021-02-23 13:34:24,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 247 transitions. [2021-02-23 13:34:24,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,314 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,314 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] [2021-02-23 13:34:24,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:34:24,314 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1791967575, now seen corresponding path program 1 times [2021-02-23 13:34:24,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150473422] [2021-02-23 13:34:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,336 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,336 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,337 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:24,340 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,365 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150473422] [2021-02-23 13:34:24,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746728962] [2021-02-23 13:34:24,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,369 INFO L87 Difference]: Start difference. First operand 159 states and 247 transitions. Second operand 4 states. [2021-02-23 13:34:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,460 INFO L93 Difference]: Finished difference Result 241 states and 373 transitions. [2021-02-23 13:34:24,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,462 INFO L225 Difference]: With dead ends: 241 [2021-02-23 13:34:24,462 INFO L226 Difference]: Without dead ends: 167 [2021-02-23 13:34:24,464 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 [2021-02-23 13:34:24,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-02-23 13:34:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2021-02-23 13:34:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-02-23 13:34:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 251 transitions. [2021-02-23 13:34:24,474 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 251 transitions. Word has length 20 [2021-02-23 13:34:24,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,475 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 251 transitions. [2021-02-23 13:34:24,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 251 transitions. [2021-02-23 13:34:24,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,477 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,477 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] [2021-02-23 13:34:24,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 13:34:24,477 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,478 INFO L82 PathProgramCache]: Analyzing trace with hash 2109972711, now seen corresponding path program 1 times [2021-02-23 13:34:24,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2579814] [2021-02-23 13:34:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,498 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,498 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,499 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,528 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2579814] [2021-02-23 13:34:24,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889483417] [2021-02-23 13:34:24,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,531 INFO L87 Difference]: Start difference. First operand 165 states and 251 transitions. Second operand 4 states. [2021-02-23 13:34:24,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,641 INFO L93 Difference]: Finished difference Result 285 states and 437 transitions. [2021-02-23 13:34:24,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,641 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,643 INFO L225 Difference]: With dead ends: 285 [2021-02-23 13:34:24,643 INFO L226 Difference]: Without dead ends: 283 [2021-02-23 13:34:24,644 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 [2021-02-23 13:34:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-02-23 13:34:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 233. [2021-02-23 13:34:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2021-02-23 13:34:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 347 transitions. [2021-02-23 13:34:24,656 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 347 transitions. Word has length 20 [2021-02-23 13:34:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,657 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 347 transitions. [2021-02-23 13:34:24,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 347 transitions. [2021-02-23 13:34:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:24,658 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,659 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] [2021-02-23 13:34:24,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 13:34:24,659 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1504936215, now seen corresponding path program 1 times [2021-02-23 13:34:24,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798561214] [2021-02-23 13:34:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,679 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:24,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798561214] [2021-02-23 13:34:24,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318998028] [2021-02-23 13:34:24,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,711 INFO L87 Difference]: Start difference. First operand 233 states and 347 transitions. Second operand 4 states. [2021-02-23 13:34:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,800 INFO L93 Difference]: Finished difference Result 525 states and 781 transitions. [2021-02-23 13:34:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,803 INFO L225 Difference]: With dead ends: 525 [2021-02-23 13:34:24,803 INFO L226 Difference]: Without dead ends: 307 [2021-02-23 13:34:24,804 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 [2021-02-23 13:34:24,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-02-23 13:34:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2021-02-23 13:34:24,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2021-02-23 13:34:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 439 transitions. [2021-02-23 13:34:24,820 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 439 transitions. Word has length 20 [2021-02-23 13:34:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,821 INFO L480 AbstractCegarLoop]: Abstraction has 305 states and 439 transitions. [2021-02-23 13:34:24,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 439 transitions. [2021-02-23 13:34:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:24,822 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,823 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] [2021-02-23 13:34:24,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 13:34:24,823 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 984860303, now seen corresponding path program 1 times [2021-02-23 13:34:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444892808] [2021-02-23 13:34:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,843 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:24,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:24,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:24,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:24,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:24,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444892808] [2021-02-23 13:34:24,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:24,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:24,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396546400] [2021-02-23 13:34:24,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:24,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:24,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:24,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:24,873 INFO L87 Difference]: Start difference. First operand 305 states and 439 transitions. Second operand 4 states. [2021-02-23 13:34:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:24,966 INFO L93 Difference]: Finished difference Result 457 states and 653 transitions. [2021-02-23 13:34:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:24,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:24,969 INFO L225 Difference]: With dead ends: 457 [2021-02-23 13:34:24,969 INFO L226 Difference]: Without dead ends: 315 [2021-02-23 13:34:24,970 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 [2021-02-23 13:34:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-02-23 13:34:24,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 313. [2021-02-23 13:34:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2021-02-23 13:34:24,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2021-02-23 13:34:24,985 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 21 [2021-02-23 13:34:24,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:24,986 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2021-02-23 13:34:24,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:24,986 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2021-02-23 13:34:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:24,987 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:24,987 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] [2021-02-23 13:34:24,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 13:34:24,987 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash 591833293, now seen corresponding path program 1 times [2021-02-23 13:34:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:24,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146215589] [2021-02-23 13:34:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,006 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,010 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,034 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,035 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146215589] [2021-02-23 13:34:25,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007405500] [2021-02-23 13:34:25,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,039 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand 4 states. [2021-02-23 13:34:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,152 INFO L93 Difference]: Finished difference Result 525 states and 737 transitions. [2021-02-23 13:34:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,155 INFO L225 Difference]: With dead ends: 525 [2021-02-23 13:34:25,156 INFO L226 Difference]: Without dead ends: 523 [2021-02-23 13:34:25,156 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 [2021-02-23 13:34:25,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-02-23 13:34:25,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 457. [2021-02-23 13:34:25,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2021-02-23 13:34:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 623 transitions. [2021-02-23 13:34:25,176 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 623 transitions. Word has length 21 [2021-02-23 13:34:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,176 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 623 transitions. [2021-02-23 13:34:25,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,176 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 623 transitions. [2021-02-23 13:34:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:25,178 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,178 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] [2021-02-23 13:34:25,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 13:34:25,178 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1271891663, now seen corresponding path program 1 times [2021-02-23 13:34:25,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458615359] [2021-02-23 13:34:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,196 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458615359] [2021-02-23 13:34:25,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631192817] [2021-02-23 13:34:25,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,231 INFO L87 Difference]: Start difference. First operand 457 states and 623 transitions. Second operand 4 states. [2021-02-23 13:34:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,342 INFO L93 Difference]: Finished difference Result 1021 states and 1377 transitions. [2021-02-23 13:34:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,346 INFO L225 Difference]: With dead ends: 1021 [2021-02-23 13:34:25,346 INFO L226 Difference]: Without dead ends: 587 [2021-02-23 13:34:25,348 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 [2021-02-23 13:34:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-02-23 13:34:25,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2021-02-23 13:34:25,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2021-02-23 13:34:25,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 759 transitions. [2021-02-23 13:34:25,378 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 759 transitions. Word has length 21 [2021-02-23 13:34:25,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,378 INFO L480 AbstractCegarLoop]: Abstraction has 585 states and 759 transitions. [2021-02-23 13:34:25,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,379 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 759 transitions. [2021-02-23 13:34:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,380 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,380 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] [2021-02-23 13:34:25,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 13:34:25,380 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1167178942, now seen corresponding path program 1 times [2021-02-23 13:34:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732834208] [2021-02-23 13:34:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,400 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:25,404 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732834208] [2021-02-23 13:34:25,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159800888] [2021-02-23 13:34:25,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,438 INFO L87 Difference]: Start difference. First operand 585 states and 759 transitions. Second operand 4 states. [2021-02-23 13:34:25,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,565 INFO L93 Difference]: Finished difference Result 877 states and 1129 transitions. [2021-02-23 13:34:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,569 INFO L225 Difference]: With dead ends: 877 [2021-02-23 13:34:25,569 INFO L226 Difference]: Without dead ends: 603 [2021-02-23 13:34:25,570 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 [2021-02-23 13:34:25,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-02-23 13:34:25,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2021-02-23 13:34:25,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2021-02-23 13:34:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 759 transitions. [2021-02-23 13:34:25,598 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 759 transitions. Word has length 22 [2021-02-23 13:34:25,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,598 INFO L480 AbstractCegarLoop]: Abstraction has 601 states and 759 transitions. [2021-02-23 13:34:25,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,599 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 759 transitions. [2021-02-23 13:34:25,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,600 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,600 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] [2021-02-23 13:34:25,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 13:34:25,600 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,601 INFO L82 PathProgramCache]: Analyzing trace with hash 774151932, now seen corresponding path program 1 times [2021-02-23 13:34:25,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762653748] [2021-02-23 13:34:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762653748] [2021-02-23 13:34:25,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949387640] [2021-02-23 13:34:25,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,654 INFO L87 Difference]: Start difference. First operand 601 states and 759 transitions. Second operand 4 states. [2021-02-23 13:34:25,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:25,786 INFO L93 Difference]: Finished difference Result 971 states and 1208 transitions. [2021-02-23 13:34:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:25,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:25,791 INFO L225 Difference]: With dead ends: 971 [2021-02-23 13:34:25,791 INFO L226 Difference]: Without dead ends: 969 [2021-02-23 13:34:25,792 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 [2021-02-23 13:34:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-02-23 13:34:25,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 905. [2021-02-23 13:34:25,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2021-02-23 13:34:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1111 transitions. [2021-02-23 13:34:25,827 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1111 transitions. Word has length 22 [2021-02-23 13:34:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:25,827 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 1111 transitions. [2021-02-23 13:34:25,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1111 transitions. [2021-02-23 13:34:25,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:25,829 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:25,829 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] [2021-02-23 13:34:25,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 13:34:25,830 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:25,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:25,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1454210302, now seen corresponding path program 1 times [2021-02-23 13:34:25,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:25,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584468369] [2021-02-23 13:34:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,846 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:25,850 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,851 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:25,877 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:25,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:25,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584468369] [2021-02-23 13:34:25,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:25,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:25,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172447503] [2021-02-23 13:34:25,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:25,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:25,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:25,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:25,882 INFO L87 Difference]: Start difference. First operand 905 states and 1111 transitions. Second operand 4 states. [2021-02-23 13:34:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:26,033 INFO L93 Difference]: Finished difference Result 1993 states and 2391 transitions. [2021-02-23 13:34:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:26,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:26,034 INFO L225 Difference]: With dead ends: 1993 [2021-02-23 13:34:26,034 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:34:26,037 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 [2021-02-23 13:34:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:34:26,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:34:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:34:26,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:34:26,039 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2021-02-23 13:34:26,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:26,039 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:34:26,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:26,039 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:34:26,040 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:34:26,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 13:34:26,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:34:26,942 WARN L202 SmtUtils]: Spent 879.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 32 [2021-02-23 13:34:26,979 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:34:26,979 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:34:26,979 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:34:26,980 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:26,980 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|)) [2021-02-23 13:34:26,980 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:26,980 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:26,980 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:34:26,980 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point L60-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 109) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point L85(line 85) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point L52-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point L94-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,981 INFO L189 CegarLoopUtils]: For program point L95(line 95) no Hoare annotation was computed. [2021-02-23 13:34:26,982 INFO L189 CegarLoopUtils]: For program point L79-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,982 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 109) no Hoare annotation was computed. [2021-02-23 13:34:26,982 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 107) no Hoare annotation was computed. [2021-02-23 13:34:26,982 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 109) the Hoare annotation is: true [2021-02-23 13:34:26,982 INFO L189 CegarLoopUtils]: For program point L80(line 80) no Hoare annotation was computed. [2021-02-23 13:34:26,982 INFO L192 CegarLoopUtils]: At program point L105(lines 7 109) the Hoare annotation is: true [2021-02-23 13:34:26,982 INFO L189 CegarLoopUtils]: For program point L31(lines 31 33) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L64-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L89-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L56-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L48(lines 48 50) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L48-2(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L90(line 90) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L189 CegarLoopUtils]: For program point L74-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,983 INFO L192 CegarLoopUtils]: At program point L99-1(lines 29 104) the Hoare annotation is: true [2021-02-23 13:34:26,984 INFO L189 CegarLoopUtils]: For program point L75(line 75) no Hoare annotation was computed. [2021-02-23 13:34:26,984 INFO L189 CegarLoopUtils]: For program point L100(line 100) no Hoare annotation was computed. [2021-02-23 13:34:26,984 INFO L185 CegarLoopUtils]: At program point L100-1(lines 7 109) the Hoare annotation is: false [2021-02-23 13:34:26,984 INFO L189 CegarLoopUtils]: For program point L84-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,984 INFO L189 CegarLoopUtils]: For program point L68-1(lines 29 104) no Hoare annotation was computed. [2021-02-23 13:34:26,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:34:26 BoogieIcfgContainer [2021-02-23 13:34:26,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:34:26,997 INFO L168 Benchmark]: Toolchain (without parser) took 5826.79 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 125.9 MB in the beginning and 130.1 MB in the end (delta: -4.2 MB). Peak memory consumption was 120.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:26,998 INFO L168 Benchmark]: CDTParser took 0.23 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. [2021-02-23 13:34:26,998 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.67 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 114.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:26,999 INFO L168 Benchmark]: Boogie Preprocessor took 38.33 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:26,999 INFO L168 Benchmark]: RCFGBuilder took 571.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 128.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:27,000 INFO L168 Benchmark]: TraceAbstraction took 4950.87 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 128.4 MB in the beginning and 130.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:27,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 249.67 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 114.8 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.33 ms. Allocated memory is still 151.0 MB. Free memory was 114.8 MB in the beginning and 113.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 571.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.4 MB in the beginning and 128.9 MB in the end (delta: -15.5 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4950.87 ms. Allocated memory was 151.0 MB in the beginning and 218.1 MB in the end (delta: 67.1 MB). Free memory was 128.4 MB in the beginning and 130.1 MB in the end (delta: -1.7 MB). Peak memory consumption was 122.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 107]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 16, TraceHistogramMax: 1, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 878 SDtfs, 1224 SDslu, 100 SDs, 0 SdLazy, 644 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=905occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 268 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 212294 FormulaSimplificationTreeSizeReduction, 0.9s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 315 NumberOfCodeBlocks, 315 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 299 ConstructedInterpolants, 0 QuantifiedInterpolants, 18875 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...