/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_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:34:28,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:34:28,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:34:28,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:34:28,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:34:28,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:34:28,533 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:34:28,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:34:28,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:34:28,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:34:28,547 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:34:28,550 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:34:28,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:34:28,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:34:28,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:34:28,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:34:28,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:34:28,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:34:28,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:34:28,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:34:28,583 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 13:34:28,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:34:28,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:34:28,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:34:28,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:34:28,642 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:34:28,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:34:28,642 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:34:28,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:34:28,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:34:28,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:34:28,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:34:28,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:34:28,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:34:28,645 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:34:28,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:34:28,645 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:34:28,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:34:28,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:34:28,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:34:28,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:34:28,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:34:28,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:34:28,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:34:28,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:34:28,647 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:34:28,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:34:28,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:34:28,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:34:28,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:34:29,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:34:29,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:34:29,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:34:29,086 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:34:29,087 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:34:29,088 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2021-02-23 13:34:29,166 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765160db5/24aad2b6a832458f988fb23ebd6058eb/FLAGb99ddff82 [2021-02-23 13:34:29,928 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:34:29,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c [2021-02-23 13:34:29,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765160db5/24aad2b6a832458f988fb23ebd6058eb/FLAGb99ddff82 [2021-02-23 13:34:29,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765160db5/24aad2b6a832458f988fb23ebd6058eb [2021-02-23 13:34:29,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:34:29,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:34:29,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:29,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:34:29,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:34:29,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:29" (1/1) ... [2021-02-23 13:34:29,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3861309b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:29, skipping insertion in model container [2021-02-23 13:34:29,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:34:29" (1/1) ... [2021-02-23 13:34:29,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:34:30,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:34:30,197 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_9.c[3555,3568] [2021-02-23 13:34:30,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:30,212 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:34:30,239 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_9.c[3555,3568] [2021-02-23 13:34:30,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:34:30,257 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:34:30,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30 WrapperNode [2021-02-23 13:34:30,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:34:30,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:34:30,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:34:30,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:34:30,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,296 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (1/1) ... [2021-02-23 13:34:30,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:34:30,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:34:30,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:34:30,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:34:30,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (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 13:34:30,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:34:30,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:34:30,408 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:34:30,408 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:34:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:34:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:34:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:34:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:34:30,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:34:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:34:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:34:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:34:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:34:30,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:34:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:34:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:34:30,896 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:34:30,897 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-23 13:34:30,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:30 BoogieIcfgContainer [2021-02-23 13:34:30,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:34:30,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:34:30,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:34:30,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:34:30,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:34:29" (1/3) ... [2021-02-23 13:34:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aa0d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:30, skipping insertion in model container [2021-02-23 13:34:30,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:34:30" (2/3) ... [2021-02-23 13:34:30,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47aa0d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:34:30, skipping insertion in model container [2021-02-23 13:34:30,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:34:30" (3/3) ... [2021-02-23 13:34:30,930 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2021-02-23 13:34:30,951 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:34:30,960 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:34:31,009 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:34:31,066 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:34:31,067 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:34:31,067 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:34:31,067 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:34:31,067 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:34:31,067 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:34:31,067 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:34:31,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:34:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2021-02-23 13:34:31,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:31,101 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:31,102 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 13:34:31,102 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:31,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:31,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1605461033, now seen corresponding path program 1 times [2021-02-23 13:34:31,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:31,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875560920] [2021-02-23 13:34:31,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,480 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:31,495 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,496 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:31,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:31,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:31,593 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 13:34:31,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875560920] [2021-02-23 13:34:31,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:31,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:31,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057142552] [2021-02-23 13:34:31,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:31,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:31,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:31,626 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 4 states. [2021-02-23 13:34:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:31,884 INFO L93 Difference]: Finished difference Result 82 states and 139 transitions. [2021-02-23 13:34:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:31,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:31,897 INFO L225 Difference]: With dead ends: 82 [2021-02-23 13:34:31,897 INFO L226 Difference]: Without dead ends: 67 [2021-02-23 13:34:31,901 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 13:34:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-23 13:34:31,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2021-02-23 13:34:31,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-02-23 13:34:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 82 transitions. [2021-02-23 13:34:31,950 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 82 transitions. Word has length 20 [2021-02-23 13:34:31,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:31,951 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 82 transitions. [2021-02-23 13:34:31,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:31,951 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 82 transitions. [2021-02-23 13:34:31,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-23 13:34:31,952 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:31,952 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 13:34:31,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:34:31,953 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:31,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:31,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1347295595, now seen corresponding path program 1 times [2021-02-23 13:34:31,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:31,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992282003] [2021-02-23 13:34:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,023 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:32,030 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,031 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,095 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,100 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 13:34:32,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992282003] [2021-02-23 13:34:32,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162838200] [2021-02-23 13:34:32,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,110 INFO L87 Difference]: Start difference. First operand 47 states and 82 transitions. Second operand 4 states. [2021-02-23 13:34:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:32,332 INFO L93 Difference]: Finished difference Result 108 states and 193 transitions. [2021-02-23 13:34:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:32,333 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-23 13:34:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:32,338 INFO L225 Difference]: With dead ends: 108 [2021-02-23 13:34:32,338 INFO L226 Difference]: Without dead ends: 67 [2021-02-23 13:34:32,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:34:32,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-23 13:34:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-02-23 13:34:32,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-23 13:34:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2021-02-23 13:34:32,377 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 20 [2021-02-23 13:34:32,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,377 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2021-02-23 13:34:32,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,377 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2021-02-23 13:34:32,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:32,382 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,382 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 13:34:32,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:34:32,383 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1770529236, now seen corresponding path program 1 times [2021-02-23 13:34:32,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712147511] [2021-02-23 13:34:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,465 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,466 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:32,471 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,520 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,523 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 13:34:32,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712147511] [2021-02-23 13:34:32,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989518028] [2021-02-23 13:34:32,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,526 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 4 states. [2021-02-23 13:34:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:32,673 INFO L93 Difference]: Finished difference Result 100 states and 172 transitions. [2021-02-23 13:34:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:32,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:32,674 INFO L225 Difference]: With dead ends: 100 [2021-02-23 13:34:32,675 INFO L226 Difference]: Without dead ends: 70 [2021-02-23 13:34:32,675 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 13:34:32,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-02-23 13:34:32,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-02-23 13:34:32,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-02-23 13:34:32,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 116 transitions. [2021-02-23 13:34:32,686 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 116 transitions. Word has length 21 [2021-02-23 13:34:32,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,686 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 116 transitions. [2021-02-23 13:34:32,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,686 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 116 transitions. [2021-02-23 13:34:32,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:32,687 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,688 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 13:34:32,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 13:34:32,688 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1183723222, now seen corresponding path program 1 times [2021-02-23 13:34:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439501715] [2021-02-23 13:34:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,720 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:32,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:32,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439501715] [2021-02-23 13:34:32,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594194599] [2021-02-23 13:34:32,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,761 INFO L87 Difference]: Start difference. First operand 68 states and 116 transitions. Second operand 4 states. [2021-02-23 13:34:32,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:32,895 INFO L93 Difference]: Finished difference Result 184 states and 324 transitions. [2021-02-23 13:34:32,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:32,895 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:32,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:32,897 INFO L225 Difference]: With dead ends: 184 [2021-02-23 13:34:32,897 INFO L226 Difference]: Without dead ends: 125 [2021-02-23 13:34:32,898 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 13:34:32,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-02-23 13:34:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-02-23 13:34:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-23 13:34:32,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 213 transitions. [2021-02-23 13:34:32,911 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 213 transitions. Word has length 21 [2021-02-23 13:34:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:32,911 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 213 transitions. [2021-02-23 13:34:32,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 213 transitions. [2021-02-23 13:34:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-23 13:34:32,913 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:32,913 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 13:34:32,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:34:32,913 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 925557784, now seen corresponding path program 1 times [2021-02-23 13:34:32,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:32,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136035321] [2021-02-23 13:34:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:32,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:32,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,945 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:32,971 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:32,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:32,972 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 13:34:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136035321] [2021-02-23 13:34:32,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:32,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:32,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805423198] [2021-02-23 13:34:32,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:32,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:32,975 INFO L87 Difference]: Start difference. First operand 123 states and 213 transitions. Second operand 4 states. [2021-02-23 13:34:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,090 INFO L93 Difference]: Finished difference Result 159 states and 275 transitions. [2021-02-23 13:34:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-02-23 13:34:33,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,092 INFO L225 Difference]: With dead ends: 159 [2021-02-23 13:34:33,092 INFO L226 Difference]: Without dead ends: 157 [2021-02-23 13:34:33,093 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 13:34:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-02-23 13:34:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 123. [2021-02-23 13:34:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-02-23 13:34:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 211 transitions. [2021-02-23 13:34:33,104 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 211 transitions. Word has length 21 [2021-02-23 13:34:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,104 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 211 transitions. [2021-02-23 13:34:33,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 211 transitions. [2021-02-23 13:34:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:33,106 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,106 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 13:34:33,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 13:34:33,106 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1959071734, now seen corresponding path program 1 times [2021-02-23 13:34:33,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425768020] [2021-02-23 13:34:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,132 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,132 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:33,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,166 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,167 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 13:34:33,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425768020] [2021-02-23 13:34:33,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089830951] [2021-02-23 13:34:33,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,170 INFO L87 Difference]: Start difference. First operand 123 states and 211 transitions. Second operand 4 states. [2021-02-23 13:34:33,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,300 INFO L93 Difference]: Finished difference Result 227 states and 395 transitions. [2021-02-23 13:34:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:33,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,303 INFO L225 Difference]: With dead ends: 227 [2021-02-23 13:34:33,303 INFO L226 Difference]: Without dead ends: 225 [2021-02-23 13:34:33,303 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 13:34:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-02-23 13:34:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 167. [2021-02-23 13:34:33,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2021-02-23 13:34:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 285 transitions. [2021-02-23 13:34:33,315 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 285 transitions. Word has length 22 [2021-02-23 13:34:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,316 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 285 transitions. [2021-02-23 13:34:33,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,316 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 285 transitions. [2021-02-23 13:34:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-23 13:34:33,318 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,318 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 13:34:33,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 13:34:33,318 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1700906296, now seen corresponding path program 1 times [2021-02-23 13:34:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151851543] [2021-02-23 13:34:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,354 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,355 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:33,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,389 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:34:33,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151851543] [2021-02-23 13:34:33,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383412337] [2021-02-23 13:34:33,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,393 INFO L87 Difference]: Start difference. First operand 167 states and 285 transitions. Second operand 4 states. [2021-02-23 13:34:33,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,528 INFO L93 Difference]: Finished difference Result 391 states and 675 transitions. [2021-02-23 13:34:33,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2021-02-23 13:34:33,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,532 INFO L225 Difference]: With dead ends: 391 [2021-02-23 13:34:33,532 INFO L226 Difference]: Without dead ends: 233 [2021-02-23 13:34:33,533 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 13:34:33,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-02-23 13:34:33,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 231. [2021-02-23 13:34:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-02-23 13:34:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 391 transitions. [2021-02-23 13:34:33,546 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 391 transitions. Word has length 22 [2021-02-23 13:34:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,546 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 391 transitions. [2021-02-23 13:34:33,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 391 transitions. [2021-02-23 13:34:33,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:33,548 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:33,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 13:34:33,549 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,549 INFO L82 PathProgramCache]: Analyzing trace with hash -601467221, now seen corresponding path program 1 times [2021-02-23 13:34:33,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883125665] [2021-02-23 13:34:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,570 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,571 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,572 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:33,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,575 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,602 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,603 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,604 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 13:34:33,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883125665] [2021-02-23 13:34:33,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090753065] [2021-02-23 13:34:33,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,606 INFO L87 Difference]: Start difference. First operand 231 states and 391 transitions. Second operand 4 states. [2021-02-23 13:34:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,737 INFO L93 Difference]: Finished difference Result 349 states and 589 transitions. [2021-02-23 13:34:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,739 INFO L225 Difference]: With dead ends: 349 [2021-02-23 13:34:33,739 INFO L226 Difference]: Without dead ends: 239 [2021-02-23 13:34:33,740 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 13:34:33,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-02-23 13:34:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2021-02-23 13:34:33,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2021-02-23 13:34:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 395 transitions. [2021-02-23 13:34:33,753 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 395 transitions. Word has length 23 [2021-02-23 13:34:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,753 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 395 transitions. [2021-02-23 13:34:33,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 395 transitions. [2021-02-23 13:34:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:33,755 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:33,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 13:34:33,755 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1188273235, now seen corresponding path program 1 times [2021-02-23 13:34:33,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364321591] [2021-02-23 13:34:33,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:33,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,809 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 13:34:33,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364321591] [2021-02-23 13:34:33,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:33,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675472280] [2021-02-23 13:34:33,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:33,811 INFO L87 Difference]: Start difference. First operand 237 states and 395 transitions. Second operand 4 states. [2021-02-23 13:34:33,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:33,952 INFO L93 Difference]: Finished difference Result 429 states and 725 transitions. [2021-02-23 13:34:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:33,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:33,955 INFO L225 Difference]: With dead ends: 429 [2021-02-23 13:34:33,955 INFO L226 Difference]: Without dead ends: 427 [2021-02-23 13:34:33,956 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 13:34:33,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-02-23 13:34:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 329. [2021-02-23 13:34:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2021-02-23 13:34:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 539 transitions. [2021-02-23 13:34:33,970 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 539 transitions. Word has length 23 [2021-02-23 13:34:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:33,971 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 539 transitions. [2021-02-23 13:34:33,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 539 transitions. [2021-02-23 13:34:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-23 13:34:33,972 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:33,972 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:33,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 13:34:33,973 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash -930107797, now seen corresponding path program 1 times [2021-02-23 13:34:33,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:33,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454597278] [2021-02-23 13:34:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:33,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:33,997 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:33,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:34,001 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,032 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,033 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,034 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 13:34:34,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454597278] [2021-02-23 13:34:34,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:34,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118722032] [2021-02-23 13:34:34,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:34,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:34,036 INFO L87 Difference]: Start difference. First operand 329 states and 539 transitions. Second operand 4 states. [2021-02-23 13:34:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:34,204 INFO L93 Difference]: Finished difference Result 765 states and 1261 transitions. [2021-02-23 13:34:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:34,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-02-23 13:34:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:34,207 INFO L225 Difference]: With dead ends: 765 [2021-02-23 13:34:34,207 INFO L226 Difference]: Without dead ends: 451 [2021-02-23 13:34:34,210 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 13:34:34,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-02-23 13:34:34,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 449. [2021-02-23 13:34:34,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2021-02-23 13:34:34,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 727 transitions. [2021-02-23 13:34:34,233 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 727 transitions. Word has length 23 [2021-02-23 13:34:34,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:34,234 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 727 transitions. [2021-02-23 13:34:34,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 727 transitions. [2021-02-23 13:34:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:34,235 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:34,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:34,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 13:34:34,236 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1818450109, now seen corresponding path program 1 times [2021-02-23 13:34:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:34,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475526115] [2021-02-23 13:34:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,285 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,286 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:34,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,325 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,327 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 13:34:34,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475526115] [2021-02-23 13:34:34,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:34,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:34,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832160871] [2021-02-23 13:34:34,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:34,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:34,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:34,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:34,329 INFO L87 Difference]: Start difference. First operand 449 states and 727 transitions. Second operand 4 states. [2021-02-23 13:34:34,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:34,489 INFO L93 Difference]: Finished difference Result 673 states and 1085 transitions. [2021-02-23 13:34:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:34,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:34,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:34,492 INFO L225 Difference]: With dead ends: 673 [2021-02-23 13:34:34,492 INFO L226 Difference]: Without dead ends: 459 [2021-02-23 13:34:34,493 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 13:34:34,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-02-23 13:34:34,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 457. [2021-02-23 13:34:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2021-02-23 13:34:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 727 transitions. [2021-02-23 13:34:34,517 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 727 transitions. Word has length 24 [2021-02-23 13:34:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:34,517 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 727 transitions. [2021-02-23 13:34:34,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:34,518 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 727 transitions. [2021-02-23 13:34:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:34,518 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:34,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:34,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 13:34:34,519 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:34,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1231644095, now seen corresponding path program 1 times [2021-02-23 13:34:34,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:34,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151086545] [2021-02-23 13:34:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:34,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,579 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 13:34:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151086545] [2021-02-23 13:34:34,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:34,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553669426] [2021-02-23 13:34:34,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:34,581 INFO L87 Difference]: Start difference. First operand 457 states and 727 transitions. Second operand 4 states. [2021-02-23 13:34:34,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:34,735 INFO L93 Difference]: Finished difference Result 813 states and 1313 transitions. [2021-02-23 13:34:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:34,736 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:34,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:34,741 INFO L225 Difference]: With dead ends: 813 [2021-02-23 13:34:34,741 INFO L226 Difference]: Without dead ends: 811 [2021-02-23 13:34:34,743 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 13:34:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2021-02-23 13:34:34,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 649. [2021-02-23 13:34:34,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2021-02-23 13:34:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1007 transitions. [2021-02-23 13:34:34,779 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 1007 transitions. Word has length 24 [2021-02-23 13:34:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:34,779 INFO L480 AbstractCegarLoop]: Abstraction has 649 states and 1007 transitions. [2021-02-23 13:34:34,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 1007 transitions. [2021-02-23 13:34:34,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-23 13:34:34,781 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:34,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:34,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 13:34:34,782 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:34,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1489809533, now seen corresponding path program 1 times [2021-02-23 13:34:34,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:34,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697006056] [2021-02-23 13:34:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:34,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:34,833 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:34,834 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:34,835 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 13:34:34,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697006056] [2021-02-23 13:34:34,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:34,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:34,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977046786] [2021-02-23 13:34:34,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:34,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:34,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:34,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:34,838 INFO L87 Difference]: Start difference. First operand 649 states and 1007 transitions. Second operand 4 states. [2021-02-23 13:34:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:35,009 INFO L93 Difference]: Finished difference Result 1501 states and 2337 transitions. [2021-02-23 13:34:35,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:35,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2021-02-23 13:34:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:35,014 INFO L225 Difference]: With dead ends: 1501 [2021-02-23 13:34:35,014 INFO L226 Difference]: Without dead ends: 875 [2021-02-23 13:34:35,016 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 13:34:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-02-23 13:34:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 873. [2021-02-23 13:34:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2021-02-23 13:34:35,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1335 transitions. [2021-02-23 13:34:35,057 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1335 transitions. Word has length 24 [2021-02-23 13:34:35,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:35,057 INFO L480 AbstractCegarLoop]: Abstraction has 873 states and 1335 transitions. [2021-02-23 13:34:35,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1335 transitions. [2021-02-23 13:34:35,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:35,059 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:35,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:35,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-23 13:34:35,060 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:35,060 INFO L82 PathProgramCache]: Analyzing trace with hash -473523648, now seen corresponding path program 1 times [2021-02-23 13:34:35,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:35,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772746422] [2021-02-23 13:34:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:35,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,115 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,117 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 13:34:35,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772746422] [2021-02-23 13:34:35,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:35,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:35,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081584566] [2021-02-23 13:34:35,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:35,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:35,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:35,120 INFO L87 Difference]: Start difference. First operand 873 states and 1335 transitions. Second operand 4 states. [2021-02-23 13:34:35,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:35,261 INFO L93 Difference]: Finished difference Result 1309 states and 1993 transitions. [2021-02-23 13:34:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:35,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:35,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:35,267 INFO L225 Difference]: With dead ends: 1309 [2021-02-23 13:34:35,267 INFO L226 Difference]: Without dead ends: 891 [2021-02-23 13:34:35,268 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 13:34:35,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2021-02-23 13:34:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2021-02-23 13:34:35,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2021-02-23 13:34:35,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1335 transitions. [2021-02-23 13:34:35,304 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1335 transitions. Word has length 25 [2021-02-23 13:34:35,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:35,304 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 1335 transitions. [2021-02-23 13:34:35,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:35,304 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1335 transitions. [2021-02-23 13:34:35,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:35,306 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:35,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:35,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-02-23 13:34:35,306 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:35,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1060329662, now seen corresponding path program 1 times [2021-02-23 13:34:35,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:35,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19298645] [2021-02-23 13:34:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,324 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,325 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,326 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,326 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:35,329 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,355 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,356 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,357 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 13:34:35,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19298645] [2021-02-23 13:34:35,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:35,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485055339] [2021-02-23 13:34:35,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:35,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:35,359 INFO L87 Difference]: Start difference. First operand 889 states and 1335 transitions. Second operand 4 states. [2021-02-23 13:34:35,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:35,529 INFO L93 Difference]: Finished difference Result 1549 states and 2361 transitions. [2021-02-23 13:34:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:35,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:35,538 INFO L225 Difference]: With dead ends: 1549 [2021-02-23 13:34:35,538 INFO L226 Difference]: Without dead ends: 1547 [2021-02-23 13:34:35,539 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 13:34:35,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1547 states. [2021-02-23 13:34:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1547 to 1289. [2021-02-23 13:34:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1289 states. [2021-02-23 13:34:35,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 1879 transitions. [2021-02-23 13:34:35,592 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 1879 transitions. Word has length 25 [2021-02-23 13:34:35,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:35,592 INFO L480 AbstractCegarLoop]: Abstraction has 1289 states and 1879 transitions. [2021-02-23 13:34:35,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:35,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 1879 transitions. [2021-02-23 13:34:35,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-23 13:34:35,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:35,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:35,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-02-23 13:34:35,630 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:35,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:35,631 INFO L82 PathProgramCache]: Analyzing trace with hash -802164224, now seen corresponding path program 1 times [2021-02-23 13:34:35,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:35,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254666159] [2021-02-23 13:34:35,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:35,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,687 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,688 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,690 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 13:34:35,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254666159] [2021-02-23 13:34:35,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:35,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:35,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779928585] [2021-02-23 13:34:35,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:35,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:35,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:35,694 INFO L87 Difference]: Start difference. First operand 1289 states and 1879 transitions. Second operand 4 states. [2021-02-23 13:34:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:35,870 INFO L93 Difference]: Finished difference Result 2957 states and 4313 transitions. [2021-02-23 13:34:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:35,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2021-02-23 13:34:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:35,879 INFO L225 Difference]: With dead ends: 2957 [2021-02-23 13:34:35,879 INFO L226 Difference]: Without dead ends: 1707 [2021-02-23 13:34:35,883 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 13:34:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-02-23 13:34:35,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1705. [2021-02-23 13:34:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1705 states. [2021-02-23 13:34:35,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1705 states to 1705 states and 2439 transitions. [2021-02-23 13:34:35,951 INFO L78 Accepts]: Start accepts. Automaton has 1705 states and 2439 transitions. Word has length 25 [2021-02-23 13:34:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:35,951 INFO L480 AbstractCegarLoop]: Abstraction has 1705 states and 2439 transitions. [2021-02-23 13:34:35,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:35,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1705 states and 2439 transitions. [2021-02-23 13:34:35,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:35,954 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:35,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:35,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-02-23 13:34:35,954 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:35,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:35,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1489734258, now seen corresponding path program 1 times [2021-02-23 13:34:35,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:35,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282342842] [2021-02-23 13:34:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:35,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,973 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,974 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:35,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:35,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:35,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:36,003 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,004 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,005 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 13:34:36,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282342842] [2021-02-23 13:34:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443304476] [2021-02-23 13:34:36,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:36,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:36,008 INFO L87 Difference]: Start difference. First operand 1705 states and 2439 transitions. Second operand 4 states. [2021-02-23 13:34:36,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:36,162 INFO L93 Difference]: Finished difference Result 2557 states and 3641 transitions. [2021-02-23 13:34:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:36,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:36,171 INFO L225 Difference]: With dead ends: 2557 [2021-02-23 13:34:36,171 INFO L226 Difference]: Without dead ends: 1739 [2021-02-23 13:34:36,173 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 13:34:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1739 states. [2021-02-23 13:34:36,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1739 to 1737. [2021-02-23 13:34:36,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2021-02-23 13:34:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2439 transitions. [2021-02-23 13:34:36,243 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2439 transitions. Word has length 26 [2021-02-23 13:34:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:36,244 INFO L480 AbstractCegarLoop]: Abstraction has 1737 states and 2439 transitions. [2021-02-23 13:34:36,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2439 transitions. [2021-02-23 13:34:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:36,246 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:36,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:36,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-23 13:34:36,247 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:36,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:36,247 INFO L82 PathProgramCache]: Analyzing trace with hash 902928244, now seen corresponding path program 1 times [2021-02-23 13:34:36,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:36,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298838657] [2021-02-23 13:34:36,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:36,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,267 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,267 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,268 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:36,271 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,272 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:36,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,300 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 13:34:36,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298838657] [2021-02-23 13:34:36,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:36,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140040438] [2021-02-23 13:34:36,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:36,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:36,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:36,302 INFO L87 Difference]: Start difference. First operand 1737 states and 2439 transitions. Second operand 4 states. [2021-02-23 13:34:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:36,519 INFO L93 Difference]: Finished difference Result 2957 states and 4201 transitions. [2021-02-23 13:34:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:36,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:36,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:36,533 INFO L225 Difference]: With dead ends: 2957 [2021-02-23 13:34:36,534 INFO L226 Difference]: Without dead ends: 2955 [2021-02-23 13:34:36,535 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 13:34:36,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2021-02-23 13:34:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2569. [2021-02-23 13:34:36,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2569 states. [2021-02-23 13:34:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2569 states to 2569 states and 3495 transitions. [2021-02-23 13:34:36,624 INFO L78 Accepts]: Start accepts. Automaton has 2569 states and 3495 transitions. Word has length 26 [2021-02-23 13:34:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:36,625 INFO L480 AbstractCegarLoop]: Abstraction has 2569 states and 3495 transitions. [2021-02-23 13:34:36,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 2569 states and 3495 transitions. [2021-02-23 13:34:36,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-23 13:34:36,629 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:36,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:36,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-02-23 13:34:36,629 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:36,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1161093682, now seen corresponding path program 1 times [2021-02-23 13:34:36,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:36,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769674251] [2021-02-23 13:34:36,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:36,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,646 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:36,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:36,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:36,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:36,678 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 13:34:36,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769674251] [2021-02-23 13:34:36,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:36,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:36,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550826944] [2021-02-23 13:34:36,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:36,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:36,680 INFO L87 Difference]: Start difference. First operand 2569 states and 3495 transitions. Second operand 4 states. [2021-02-23 13:34:36,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:36,872 INFO L93 Difference]: Finished difference Result 5837 states and 7913 transitions. [2021-02-23 13:34:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:36,873 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2021-02-23 13:34:36,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:36,889 INFO L225 Difference]: With dead ends: 5837 [2021-02-23 13:34:36,889 INFO L226 Difference]: Without dead ends: 3339 [2021-02-23 13:34:36,895 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 13:34:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3339 states. [2021-02-23 13:34:37,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3339 to 3337. [2021-02-23 13:34:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3337 states. [2021-02-23 13:34:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4423 transitions. [2021-02-23 13:34:37,071 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4423 transitions. Word has length 26 [2021-02-23 13:34:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:37,071 INFO L480 AbstractCegarLoop]: Abstraction has 3337 states and 4423 transitions. [2021-02-23 13:34:37,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:37,071 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4423 transitions. [2021-02-23 13:34:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 13:34:37,075 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:37,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:37,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-02-23 13:34:37,076 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash -2073779755, now seen corresponding path program 1 times [2021-02-23 13:34:37,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:37,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880207781] [2021-02-23 13:34:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:37,109 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,109 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,110 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,110 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:37,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,114 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:37,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,142 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 13:34:37,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880207781] [2021-02-23 13:34:37,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:37,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:37,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807609481] [2021-02-23 13:34:37,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:37,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:37,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:37,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:37,144 INFO L87 Difference]: Start difference. First operand 3337 states and 4423 transitions. Second operand 4 states. [2021-02-23 13:34:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:37,315 INFO L93 Difference]: Finished difference Result 5005 states and 6601 transitions. [2021-02-23 13:34:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:37,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-23 13:34:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:37,331 INFO L225 Difference]: With dead ends: 5005 [2021-02-23 13:34:37,331 INFO L226 Difference]: Without dead ends: 3403 [2021-02-23 13:34:37,335 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 13:34:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3403 states. [2021-02-23 13:34:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3403 to 3401. [2021-02-23 13:34:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3401 states. [2021-02-23 13:34:37,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 4423 transitions. [2021-02-23 13:34:37,458 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 4423 transitions. Word has length 27 [2021-02-23 13:34:37,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:37,459 INFO L480 AbstractCegarLoop]: Abstraction has 3401 states and 4423 transitions. [2021-02-23 13:34:37,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:37,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 4423 transitions. [2021-02-23 13:34:37,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 13:34:37,463 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:37,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:37,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-02-23 13:34:37,465 INFO L428 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:37,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1634381527, now seen corresponding path program 1 times [2021-02-23 13:34:37,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:37,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998403364] [2021-02-23 13:34:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:37,486 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,487 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:37,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:37,518 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:37,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:37,522 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 13:34:37,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998403364] [2021-02-23 13:34:37,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:37,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:37,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874064090] [2021-02-23 13:34:37,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:37,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:37,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:37,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:37,524 INFO L87 Difference]: Start difference. First operand 3401 states and 4423 transitions. Second operand 4 states. [2021-02-23 13:34:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:37,772 INFO L93 Difference]: Finished difference Result 5645 states and 7369 transitions. [2021-02-23 13:34:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:37,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-23 13:34:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:37,821 INFO L225 Difference]: With dead ends: 5645 [2021-02-23 13:34:37,822 INFO L226 Difference]: Without dead ends: 5643 [2021-02-23 13:34:37,824 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 13:34:37,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5643 states. [2021-02-23 13:34:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5643 to 5129. [2021-02-23 13:34:37,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5129 states. [2021-02-23 13:34:37,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 6471 transitions. [2021-02-23 13:34:37,984 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 6471 transitions. Word has length 27 [2021-02-23 13:34:37,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:37,984 INFO L480 AbstractCegarLoop]: Abstraction has 5129 states and 6471 transitions. [2021-02-23 13:34:37,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:37,985 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 6471 transitions. [2021-02-23 13:34:37,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-23 13:34:37,995 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:37,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:37,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-02-23 13:34:37,996 INFO L428 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1892546965, now seen corresponding path program 1 times [2021-02-23 13:34:37,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:37,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659923770] [2021-02-23 13:34:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:38,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,017 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,017 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:38,020 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,021 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:38,046 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,049 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,051 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 13:34:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659923770] [2021-02-23 13:34:38,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:38,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436251350] [2021-02-23 13:34:38,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:38,053 INFO L87 Difference]: Start difference. First operand 5129 states and 6471 transitions. Second operand 4 states. [2021-02-23 13:34:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:38,337 INFO L93 Difference]: Finished difference Result 11533 states and 14409 transitions. [2021-02-23 13:34:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:38,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-02-23 13:34:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:38,352 INFO L225 Difference]: With dead ends: 11533 [2021-02-23 13:34:38,352 INFO L226 Difference]: Without dead ends: 6539 [2021-02-23 13:34:38,363 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 13:34:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2021-02-23 13:34:38,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6537. [2021-02-23 13:34:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6537 states. [2021-02-23 13:34:38,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 7943 transitions. [2021-02-23 13:34:38,596 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 7943 transitions. Word has length 27 [2021-02-23 13:34:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:38,597 INFO L480 AbstractCegarLoop]: Abstraction has 6537 states and 7943 transitions. [2021-02-23 13:34:38,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:38,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 7943 transitions. [2021-02-23 13:34:38,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:34:38,606 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:38,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:38,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-02-23 13:34:38,606 INFO L428 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:38,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:38,606 INFO L82 PathProgramCache]: Analyzing trace with hash -873564121, now seen corresponding path program 1 times [2021-02-23 13:34:38,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:38,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440324464] [2021-02-23 13:34:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:38,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:38,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,622 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 13:34:38,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:38,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:38,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:38,653 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 13:34:38,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440324464] [2021-02-23 13:34:38,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:38,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:38,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217493047] [2021-02-23 13:34:38,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:38,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:38,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:38,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:38,654 INFO L87 Difference]: Start difference. First operand 6537 states and 7943 transitions. Second operand 4 states. [2021-02-23 13:34:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:38,915 INFO L93 Difference]: Finished difference Result 9805 states and 11849 transitions. [2021-02-23 13:34:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:38,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-23 13:34:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:38,929 INFO L225 Difference]: With dead ends: 9805 [2021-02-23 13:34:38,930 INFO L226 Difference]: Without dead ends: 6667 [2021-02-23 13:34:38,936 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 13:34:38,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2021-02-23 13:34:39,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6665. [2021-02-23 13:34:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6665 states. [2021-02-23 13:34:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 7943 transitions. [2021-02-23 13:34:39,140 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 7943 transitions. Word has length 28 [2021-02-23 13:34:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:39,141 INFO L480 AbstractCegarLoop]: Abstraction has 6665 states and 7943 transitions. [2021-02-23 13:34:39,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:39,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 7943 transitions. [2021-02-23 13:34:39,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:34:39,149 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:39,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:39,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-02-23 13:34:39,150 INFO L428 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:39,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:39,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1460370135, now seen corresponding path program 1 times [2021-02-23 13:34:39,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:39,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10939753] [2021-02-23 13:34:39,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:39,164 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,165 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:39,168 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:39,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,195 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 13:34:39,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10939753] [2021-02-23 13:34:39,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:39,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:39,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499744153] [2021-02-23 13:34:39,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:39,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:39,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:39,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:39,197 INFO L87 Difference]: Start difference. First operand 6665 states and 7943 transitions. Second operand 4 states. [2021-02-23 13:34:39,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:39,564 INFO L93 Difference]: Finished difference Result 10763 states and 12680 transitions. [2021-02-23 13:34:39,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:39,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-23 13:34:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:39,582 INFO L225 Difference]: With dead ends: 10763 [2021-02-23 13:34:39,583 INFO L226 Difference]: Without dead ends: 10761 [2021-02-23 13:34:39,585 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 13:34:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10761 states. [2021-02-23 13:34:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10761 to 10249. [2021-02-23 13:34:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10249 states. [2021-02-23 13:34:39,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10249 states to 10249 states and 11911 transitions. [2021-02-23 13:34:39,846 INFO L78 Accepts]: Start accepts. Automaton has 10249 states and 11911 transitions. Word has length 28 [2021-02-23 13:34:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:39,846 INFO L480 AbstractCegarLoop]: Abstraction has 10249 states and 11911 transitions. [2021-02-23 13:34:39,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:39,846 INFO L276 IsEmpty]: Start isEmpty. Operand 10249 states and 11911 transitions. [2021-02-23 13:34:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-23 13:34:39,860 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:34:39,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:34:39,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-02-23 13:34:39,861 INFO L428 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:34:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:34:39,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1202204697, now seen corresponding path program 1 times [2021-02-23 13:34:39,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:34:39,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249353958] [2021-02-23 13:34:39,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:34:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:39,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:34:39,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:34:39,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:34:39,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:34:39,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:34:39,905 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 13:34:39,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249353958] [2021-02-23 13:34:39,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:34:39,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:34:39,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649102225] [2021-02-23 13:34:39,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:34:39,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:34:39,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:34:39,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:34:39,906 INFO L87 Difference]: Start difference. First operand 10249 states and 11911 transitions. Second operand 4 states. [2021-02-23 13:34:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:34:40,294 INFO L93 Difference]: Finished difference Result 22793 states and 25991 transitions. [2021-02-23 13:34:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 13:34:40,295 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2021-02-23 13:34:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:34:40,295 INFO L225 Difference]: With dead ends: 22793 [2021-02-23 13:34:40,295 INFO L226 Difference]: Without dead ends: 0 [2021-02-23 13:34:40,330 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 13:34:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-23 13:34:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-23 13:34:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-23 13:34:40,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-23 13:34:40,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2021-02-23 13:34:40,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:34:40,331 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-23 13:34:40,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:34:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-23 13:34:40,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-23 13:34:40,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-02-23 13:34:40,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-23 13:34:55,860 WARN L202 SmtUtils]: Spent 15.51 s on a formula simplification. DAG size of input: 2122 DAG size of output: 32 [2021-02-23 13:34:55,903 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-23 13:34:55,904 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-23 13:34:55,904 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-23 13:34:55,904 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:55,905 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 13:34:55,905 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-23 13:34:55,905 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point L126-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 6 151) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point L102(line 102) no Hoare annotation was computed. [2021-02-23 13:34:55,905 INFO L189 CegarLoopUtils]: For program point L127(line 127) no Hoare annotation was computed. [2021-02-23 13:34:55,906 INFO L189 CegarLoopUtils]: For program point L111-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,906 INFO L189 CegarLoopUtils]: For program point L136-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L95-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L87-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L112(line 112) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L79-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 6 151) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L137(line 137) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L71-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 149) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L189 CegarLoopUtils]: For program point L63(lines 63 65) no Hoare annotation was computed. [2021-02-23 13:34:55,907 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 6 151) the Hoare annotation is: true [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L63-2(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L121-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L122(line 122) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L192 CegarLoopUtils]: At program point L147(lines 7 151) the Hoare annotation is: true [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L106-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L40(lines 40 42) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L131-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L107(line 107) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L132(line 132) no Hoare annotation was computed. [2021-02-23 13:34:55,908 INFO L189 CegarLoopUtils]: For program point L91-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L116-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L83-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L192 CegarLoopUtils]: At program point L141-1(lines 38 146) the Hoare annotation is: true [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L75-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L67-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L117(line 117) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L142(line 142) no Hoare annotation was computed. [2021-02-23 13:34:55,909 INFO L185 CegarLoopUtils]: At program point L142-1(lines 7 151) the Hoare annotation is: false [2021-02-23 13:34:55,909 INFO L189 CegarLoopUtils]: For program point L101-1(lines 38 146) no Hoare annotation was computed. [2021-02-23 13:34:55,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:34:55 BoogieIcfgContainer [2021-02-23 13:34:55,924 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:34:55,925 INFO L168 Benchmark]: Toolchain (without parser) took 25964.95 ms. Allocated memory was 173.0 MB in the beginning and 721.4 MB in the end (delta: 548.4 MB). Free memory was 147.3 MB in the beginning and 363.9 MB in the end (delta: -216.6 MB). Peak memory consumption was 461.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:55,925 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 173.0 MB. Free memory was 143.7 MB in the beginning and 143.5 MB in the end (delta: 122.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:34:55,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.32 ms. Allocated memory is still 173.0 MB. Free memory was 146.3 MB in the beginning and 136.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:55,926 INFO L168 Benchmark]: Boogie Preprocessor took 42.17 ms. Allocated memory is still 173.0 MB. Free memory was 136.2 MB in the beginning and 134.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:55,926 INFO L168 Benchmark]: RCFGBuilder took 603.63 ms. Allocated memory is still 173.0 MB. Free memory was 134.3 MB in the beginning and 148.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:55,927 INFO L168 Benchmark]: TraceAbstraction took 25015.85 ms. Allocated memory was 173.0 MB in the beginning and 721.4 MB in the end (delta: 548.4 MB). Free memory was 148.6 MB in the beginning and 363.9 MB in the end (delta: -215.3 MB). Peak memory consumption was 461.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:34:55,937 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 173.0 MB. Free memory was 143.7 MB in the beginning and 143.5 MB in the end (delta: 122.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 282.32 ms. Allocated memory is still 173.0 MB. Free memory was 146.3 MB in the beginning and 136.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.17 ms. Allocated memory is still 173.0 MB. Free memory was 136.2 MB in the beginning and 134.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 603.63 ms. Allocated memory is still 173.0 MB. Free memory was 134.3 MB in the beginning and 148.6 MB in the end (delta: -14.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25015.85 ms. Allocated memory was 173.0 MB in the beginning and 721.4 MB in the end (delta: 548.4 MB). Free memory was 148.6 MB in the beginning and 363.9 MB in the end (delta: -215.3 MB). Peak memory consumption was 461.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 149]: 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: 38]: 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, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.2s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 5.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1943 SDtfs, 2859 SDslu, 154 SDs, 0 SdLazy, 1415 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 175 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10249occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 NumberOfFragments, 37 HoareAnnotationTreeSize, 7 FomulaSimplifications, 13725542 FormulaSimplificationTreeSizeReduction, 15.5s HoareSimplificationTime, 7 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 606 NumberOfCodeBlocks, 606 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 581 ConstructedInterpolants, 0 QuantifiedInterpolants, 43466 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...