/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:53:38,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:53:38,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:53:38,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:53:38,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:53:38,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:53:38,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:53:38,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:53:38,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:53:38,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:53:38,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:53:38,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:53:38,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:53:38,237 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:53:38,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:53:38,240 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:53:38,244 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:53:38,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:53:38,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:53:38,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:53:38,253 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 05:53:38,266 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:53:38,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:53:38,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:53:38,268 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:53:38,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:53:38,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:53:38,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:53:38,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:53:38,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:53:38,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:53:38,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:53:38,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:53:38,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:53:38,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:53:38,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:53:38,271 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 05:53:38,272 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:53:38,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:53:38,497 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:53:38,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:53:38,500 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:53:38,500 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:53:38,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2021-05-06 05:53:38,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371d7aa25/5fcff31ce83e4e698473db55f62d4bf8/FLAG79a987c3d [2021-05-06 05:53:38,919 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:53:38,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2021-05-06 05:53:38,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371d7aa25/5fcff31ce83e4e698473db55f62d4bf8/FLAG79a987c3d [2021-05-06 05:53:38,938 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/371d7aa25/5fcff31ce83e4e698473db55f62d4bf8 [2021-05-06 05:53:38,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:53:38,942 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 05:53:38,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:53:38,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:53:38,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:53:38,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:53:38" (1/1) ... [2021-05-06 05:53:38,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1adba3ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:38, skipping insertion in model container [2021-05-06 05:53:38,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:53:38" (1/1) ... [2021-05-06 05:53:38,954 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:53:38,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:53:39,090 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2021-05-06 05:53:39,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:53:39,113 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:53:39,158 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i[893,906] [2021-05-06 05:53:39,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:53:39,180 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:53:39,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39 WrapperNode [2021-05-06 05:53:39,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:53:39,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:53:39,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:53:39,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:53:39,190 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:53:39,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:53:39,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:53:39,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:53:39,217 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:53:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:53:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:53:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:53:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:53:39,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:53:39,291 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:53:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:53:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:53:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 05:53:39,291 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:53:39,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:53:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:53:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:53:39,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:53:39,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:53:39,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:53:39,494 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:53:39,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:53:39 BoogieIcfgContainer [2021-05-06 05:53:39,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:53:39,496 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 05:53:39,496 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 05:53:39,496 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 05:53:39,498 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:53:39" (1/1) ... [2021-05-06 05:53:39,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:53:39 BasicIcfg [2021-05-06 05:53:39,507 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 05:53:39,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:53:39,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:53:39,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:53:39,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:53:38" (1/4) ... [2021-05-06 05:53:39,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6704b14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:53:39, skipping insertion in model container [2021-05-06 05:53:39,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:53:39" (2/4) ... [2021-05-06 05:53:39,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6704b14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:53:39, skipping insertion in model container [2021-05-06 05:53:39,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:53:39" (3/4) ... [2021-05-06 05:53:39,511 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6704b14f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:53:39, skipping insertion in model container [2021-05-06 05:53:39,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 05:53:39" (4/4) ... [2021-05-06 05:53:39,512 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iJordan [2021-05-06 05:53:39,515 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:53:39,518 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:53:39,529 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:53:39,540 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:53:39,541 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 05:53:39,541 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 05:53:39,541 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:53:39,541 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:53:39,541 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:53:39,541 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:53:39,541 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:53:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:53:39,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 05:53:39,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:39,554 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:39,555 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2021-05-06 05:53:39,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:39,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753678225] [2021-05-06 05:53:39,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:39,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:39,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:53:39,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:39,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753678225] [2021-05-06 05:53:39,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753678225] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:39,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:39,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:53:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541876693] [2021-05-06 05:53:39,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:53:39,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:39,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:53:39,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:53:39,792 INFO L87 Difference]: Start difference. First operand has 36 states, 21 states have (on average 1.380952380952381) internal successors, (29), 23 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:53:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:39,866 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 05:53:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:53:39,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-06 05:53:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:39,873 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:53:39,873 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 05:53:39,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:53:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 05:53:39,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 05:53:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:53:39,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 05:53:39,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2021-05-06 05:53:39,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:39,902 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 05:53:39,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:53:39,902 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 05:53:39,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-06 05:53:39,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:39,903 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:39,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:53:39,903 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:39,904 INFO L82 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2021-05-06 05:53:39,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:39,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464685038] [2021-05-06 05:53:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:53:40,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:40,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464685038] [2021-05-06 05:53:40,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464685038] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:40,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:40,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:53:40,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369673493] [2021-05-06 05:53:40,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:53:40,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:40,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:53:40,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:53:40,035 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:53:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:40,245 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-06 05:53:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:53:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-06 05:53:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:40,247 INFO L225 Difference]: With dead ends: 34 [2021-05-06 05:53:40,247 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:53:40,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:53:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:53:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 05:53:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:53:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 05:53:40,252 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2021-05-06 05:53:40,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:40,253 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 05:53:40,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:53:40,253 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 05:53:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 05:53:40,253 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:40,254 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:40,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:53:40,254 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:40,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2021-05-06 05:53:40,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:40,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259674088] [2021-05-06 05:53:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 05:53:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:53:40,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:40,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259674088] [2021-05-06 05:53:40,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259674088] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:40,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:40,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:53:40,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186238709] [2021-05-06 05:53:40,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:53:40,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:40,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:53:40,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:53:40,323 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:53:40,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:40,549 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-05-06 05:53:40,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:53:40,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-05-06 05:53:40,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:40,550 INFO L225 Difference]: With dead ends: 47 [2021-05-06 05:53:40,550 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 05:53:40,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:53:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 05:53:40,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-05-06 05:53:40,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 29 states have internal predecessors, (31), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:53:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-05-06 05:53:40,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-05-06 05:53:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:40,568 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-05-06 05:53:40,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:53:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-05-06 05:53:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:53:40,570 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:40,570 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:40,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:53:40,570 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:40,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:40,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2021-05-06 05:53:40,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:40,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981503243] [2021-05-06 05:53:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:40,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:40,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:40,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:40,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:53:40,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:40,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981503243] [2021-05-06 05:53:40,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981503243] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:40,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:40,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 05:53:40,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13987577] [2021-05-06 05:53:40,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:53:40,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:40,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:53:40,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:53:40,667 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:53:40,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:40,949 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-05-06 05:53:40,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:53:40,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 05:53:40,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:40,966 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:53:40,966 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 05:53:40,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:53:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 05:53:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-05-06 05:53:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:53:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-05-06 05:53:40,970 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2021-05-06 05:53:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:40,970 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-05-06 05:53:40,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:53:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-05-06 05:53:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 05:53:40,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:40,971 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:40,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-06 05:53:40,971 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:40,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2021-05-06 05:53:40,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:40,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468918470] [2021-05-06 05:53:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 05:53:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 05:53:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-06 05:53:41,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:53:41,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:41,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468918470] [2021-05-06 05:53:41,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468918470] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:41,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:41,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 05:53:41,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742284149] [2021-05-06 05:53:41,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:53:41,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:41,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:53:41,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:53:41,064 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:53:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:41,387 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-05-06 05:53:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:53:41,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-06 05:53:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:41,388 INFO L225 Difference]: With dead ends: 73 [2021-05-06 05:53:41,388 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 05:53:41,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-06 05:53:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 05:53:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-06 05:53:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.125) internal successors, (45), 43 states have internal predecessors, (45), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 05:53:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-05-06 05:53:41,394 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2021-05-06 05:53:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:41,394 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-05-06 05:53:41,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:53:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-05-06 05:53:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 05:53:41,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:41,395 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:41,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 05:53:41,395 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2021-05-06 05:53:41,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:41,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351139684] [2021-05-06 05:53:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:41,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:53:41,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:53:41,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:41,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351139684] [2021-05-06 05:53:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351139684] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:53:41,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:53:41,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 05:53:41,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610569757] [2021-05-06 05:53:41,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:53:41,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:41,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:53:41,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:53:41,478 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:53:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:41,808 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-05-06 05:53:41,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:53:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 05:53:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:41,810 INFO L225 Difference]: With dead ends: 75 [2021-05-06 05:53:41,810 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 05:53:41,810 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-06 05:53:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 05:53:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-05-06 05:53:41,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 46 states have internal predecessors, (48), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 05:53:41,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-05-06 05:53:41,814 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2021-05-06 05:53:41,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:41,815 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-05-06 05:53:41,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 05:53:41,815 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-05-06 05:53:41,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-06 05:53:41,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:41,816 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:41,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-06 05:53:41,816 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2021-05-06 05:53:41,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:41,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186750452] [2021-05-06 05:53:41,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:41,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:53:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:53:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-06 05:53:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-06 05:53:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-06 05:53:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:53:41,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186750452] [2021-05-06 05:53:41,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186750452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:41,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264835426] [2021-05-06 05:53:41,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 05:53:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:53:42,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:53:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264835426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:42,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:53:42,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-05-06 05:53:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616289909] [2021-05-06 05:53:42,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 05:53:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:42,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 05:53:42,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-06 05:53:42,366 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 05:53:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:42,796 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-05-06 05:53:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:53:42,797 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 57 [2021-05-06 05:53:42,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:42,799 INFO L225 Difference]: With dead ends: 90 [2021-05-06 05:53:42,799 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 05:53:42,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-05-06 05:53:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 05:53:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-06 05:53:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 54 states have internal predecessors, (56), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:53:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2021-05-06 05:53:42,818 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 57 [2021-05-06 05:53:42,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:42,821 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2021-05-06 05:53:42,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 05:53:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2021-05-06 05:53:42,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 05:53:42,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:42,822 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:43,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:53:43,041 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2021-05-06 05:53:43,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:43,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330014283] [2021-05-06 05:53:43,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:43,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:43,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:53:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:53:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-06 05:53:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-06 05:53:43,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-06 05:53:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:53:43,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:43,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330014283] [2021-05-06 05:53:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330014283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897869077] [2021-05-06 05:53:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 05:53:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:53:43,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:53:43,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897869077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:43,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:53:43,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-06 05:53:43,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486797163] [2021-05-06 05:53:43,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 05:53:43,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 05:53:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-06 05:53:43,460 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 05:53:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:43,868 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-05-06 05:53:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:53:43,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 59 [2021-05-06 05:53:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:43,869 INFO L225 Difference]: With dead ends: 92 [2021-05-06 05:53:43,869 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 05:53:43,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-05-06 05:53:43,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 05:53:43,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-05-06 05:53:43,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:53:43,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-05-06 05:53:43,885 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 59 [2021-05-06 05:53:43,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:43,885 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-05-06 05:53:43,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-06 05:53:43,886 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-05-06 05:53:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 05:53:43,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:43,887 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:44,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:44,088 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash 133870084, now seen corresponding path program 2 times [2021-05-06 05:53:44,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:44,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575124957] [2021-05-06 05:53:44,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:53:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:53:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-06 05:53:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-06 05:53:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-06 05:53:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-06 05:53:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-05-06 05:53:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-06 05:53:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-05-06 05:53:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:44,247 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 05:53:44,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575124957] [2021-05-06 05:53:44,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575124957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:44,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443685805] [2021-05-06 05:53:44,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:44,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:53:44,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:53:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:53:44,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:53:44,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:44,576 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:53:44,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443685805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:44,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:53:44,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-06 05:53:44,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410452291] [2021-05-06 05:53:44,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-06 05:53:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:44,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-06 05:53:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-05-06 05:53:44,578 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2021-05-06 05:53:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:45,501 INFO L93 Difference]: Finished difference Result 107 states and 129 transitions. [2021-05-06 05:53:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 05:53:45,502 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) Word has length 82 [2021-05-06 05:53:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:45,503 INFO L225 Difference]: With dead ends: 107 [2021-05-06 05:53:45,503 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 05:53:45,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 687.1ms TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2021-05-06 05:53:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 05:53:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-05-06 05:53:45,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:53:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-05-06 05:53:45,507 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 82 [2021-05-06 05:53:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:45,507 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-05-06 05:53:45,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 12 states have call predecessors, (23), 11 states have call successors, (23) [2021-05-06 05:53:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-05-06 05:53:45,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 05:53:45,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:53:45,509 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:53:45,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:53:45,729 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:53:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:53:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2021-05-06 05:53:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:53:45,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686936711] [2021-05-06 05:53:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:53:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:53:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 05:53:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-06 05:53:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-06 05:53:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-06 05:53:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-06 05:53:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-06 05:53:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-06 05:53:45,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-06 05:53:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-06 05:53:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-05-06 05:53:45,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-05-06 05:53:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:53:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 05:53:45,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:53:45,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686936711] [2021-05-06 05:53:45,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686936711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:45,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755541290] [2021-05-06 05:53:45,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:45,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:53:45,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:53:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 05:53:45,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:53:45,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:45,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:45,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:45,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:53:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:53:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755541290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:53:46,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 05:53:46,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-05-06 05:53:46,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056761456] [2021-05-06 05:53:46,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-06 05:53:46,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:53:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-06 05:53:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-06 05:53:46,253 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 05:53:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:53:47,119 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-05-06 05:53:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 05:53:47,119 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 84 [2021-05-06 05:53:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:53:47,120 INFO L225 Difference]: With dead ends: 93 [2021-05-06 05:53:47,120 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:53:47,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 762.5ms TimeCoverageRelationStatistics Valid=347, Invalid=1459, Unknown=0, NotChecked=0, Total=1806 [2021-05-06 05:53:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:53:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:53:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:53:47,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:53:47,121 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2021-05-06 05:53:47,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:53:47,121 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:53:47,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 22 states have (on average 2.272727272727273) internal successors, (50), 22 states have internal predecessors, (50), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-06 05:53:47,121 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:53:47,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:53:47,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:53:47,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:53:47 BasicIcfg [2021-05-06 05:53:47,342 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:53:47,342 INFO L168 Benchmark]: Toolchain (without parser) took 8400.55 ms. Allocated memory was 192.9 MB in the beginning and 292.6 MB in the end (delta: 99.6 MB). Free memory was 157.6 MB in the beginning and 225.3 MB in the end (delta: -67.7 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,342 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 174.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:53:47,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.25 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 175.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,343 INFO L168 Benchmark]: Boogie Preprocessor took 34.27 ms. Allocated memory is still 192.9 MB. Free memory was 175.2 MB in the beginning and 174.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,343 INFO L168 Benchmark]: RCFGBuilder took 278.72 ms. Allocated memory is still 192.9 MB. Free memory was 173.6 MB in the beginning and 156.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,343 INFO L168 Benchmark]: IcfgTransformer took 11.86 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 155.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,343 INFO L168 Benchmark]: TraceAbstraction took 7833.50 ms. Allocated memory was 192.9 MB in the beginning and 292.6 MB in the end (delta: 99.6 MB). Free memory was 155.3 MB in the beginning and 225.3 MB in the end (delta: -70.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:53:47,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 192.9 MB. Free memory is still 174.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.25 ms. Allocated memory is still 192.9 MB. Free memory was 157.4 MB in the beginning and 175.2 MB in the end (delta: -17.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.27 ms. Allocated memory is still 192.9 MB. Free memory was 175.2 MB in the beginning and 174.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.72 ms. Allocated memory is still 192.9 MB. Free memory was 173.6 MB in the beginning and 156.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.86 ms. Allocated memory is still 192.9 MB. Free memory was 156.9 MB in the beginning and 155.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7833.50 ms. Allocated memory was 192.9 MB in the beginning and 292.6 MB in the end (delta: 99.6 MB). Free memory was 155.3 MB in the beginning and 225.3 MB in the end (delta: -70.0 MB). Peak memory consumption was 31.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7800.0ms, OverallIterations: 10, TraceHistogramMax: 12, EmptinessCheckTime: 13.6ms, AutomataDifference: 4134.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 271 SDtfs, 715 SDslu, 597 SDs, 0 SdLazy, 2125 SolverSat, 872 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1659.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 370 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2672.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=8, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 91.4ms AutomataMinimizationTime, 10 MinimizatonAttempts, 40 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 59.3ms SsaConstructionTime, 196.3ms SatisfiabilityAnalysisTime, 2199.4ms InterpolantComputationTime, 711 NumberOfCodeBlocks, 711 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 697 ConstructedInterpolants, 0 QuantifiedInterpolants, 2746 SizeOfPredicates, 10 NumberOfNonLiveVariables, 740 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 1405/1508 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...