/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-c225d54 [2021-05-02 18:08:57,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:08:57,475 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:08:57,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:08:57,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:08:57,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:08:57,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:08:57,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:08:57,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:08:57,528 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:08:57,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:08:57,531 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:08:57,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:08:57,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:08:57,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:08:57,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:08:57,537 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:08:57,538 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:08:57,540 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:08:57,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:08:57,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:08:57,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:08:57,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:08:57,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:08:57,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:08:57,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:08:57,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:08:57,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:08:57,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:08:57,588 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:08:57,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:08:57,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:08:57,590 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:08:57,591 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:08:57,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:08:57,592 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:08:57,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:08:57,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:08:57,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:08:57,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:08:57,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:08:57,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:08:57,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:08:57,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:08:57,594 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:08:57,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:08:57,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:08:57,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:08:57,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:08:57,946 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:08:57,946 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:08:57,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2021-05-02 18:08:58,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc80fed6/cb72fa7151c7489ba913f73ee3db5756/FLAG4ea578bdb [2021-05-02 18:08:58,384 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:08:58,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i [2021-05-02 18:08:58,390 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc80fed6/cb72fa7151c7489ba913f73ee3db5756/FLAG4ea578bdb [2021-05-02 18:08:58,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4bc80fed6/cb72fa7151c7489ba913f73ee3db5756 [2021-05-02 18:08:58,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:08:58,409 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:08:58,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:58,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:08:58,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:08:58,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d3503d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58, skipping insertion in model container [2021-05-02 18:08:58,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,424 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:08:58,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:08:58,543 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] [2021-05-02 18:08:58,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:58,563 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:08:58,598 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] [2021-05-02 18:08:58,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:58,639 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:08:58,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58 WrapperNode [2021-05-02 18:08:58,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:58,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:08:58,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:08:58,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:08:58,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (1/1) ... [2021-05-02 18:08:58,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:08:58,686 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:08:58,686 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:08:58,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:08:58,687 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (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 [2021-05-02 18:08:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:08:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:08:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:08:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:08:58,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:08:58,760 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:08:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:08:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:08:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:08:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:08:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:08:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:08:59,092 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:08:59,092 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:08:59,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:59 BoogieIcfgContainer [2021-05-02 18:08:59,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:08:59,094 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:08:59,094 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:08:59,095 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:08:59,097 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:59" (1/1) ... [2021-05-02 18:08:59,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:59 BasicIcfg [2021-05-02 18:08:59,117 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:08:59,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:08:59,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:08:59,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:08:59,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:08:58" (1/4) ... [2021-05-02 18:08:59,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5929ea9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:59, skipping insertion in model container [2021-05-02 18:08:59,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:58" (2/4) ... [2021-05-02 18:08:59,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5929ea9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:59, skipping insertion in model container [2021-05-02 18:08:59,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:59" (3/4) ... [2021-05-02 18:08:59,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5929ea9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:59, skipping insertion in model container [2021-05-02 18:08:59,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:59" (4/4) ... [2021-05-02 18:08:59,126 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.iJordan [2021-05-02 18:08:59,133 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:08:59,137 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:08:59,152 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:08:59,175 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:08:59,175 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:08:59,175 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:08:59,175 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:08:59,175 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:08:59,176 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:08:59,176 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:08:59,176 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:08:59,190 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) [2021-05-02 18:08:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 18:08:59,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:59,197 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:59,197 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:59,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:59,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1933732557, now seen corresponding path program 1 times [2021-05-02 18:08:59,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:59,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879741391] [2021-05-02 18:08:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:59,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:59,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:59,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879741391] [2021-05-02 18:08:59,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879741391] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:59,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:59,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:08:59,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452537628] [2021-05-02 18:08:59,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:08:59,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:59,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:08:59,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:08:59,491 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) [2021-05-02 18:08:59,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:59,578 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-02 18:08:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:08:59,580 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 [2021-05-02 18:08:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:59,586 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:08:59,586 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 18:08:59,587 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:08:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 18:08:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 18:08:59,614 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) [2021-05-02 18:08:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 18:08:59,617 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 15 [2021-05-02 18:08:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:59,617 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 18:08:59,617 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) [2021-05-02 18:08:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 18:08:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:08:59,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:59,618 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:59,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:08:59,619 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:59,619 INFO L82 PathProgramCache]: Analyzing trace with hash 213262551, now seen corresponding path program 1 times [2021-05-02 18:08:59,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:59,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228568103] [2021-05-02 18:08:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:59,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:59,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:59,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:59,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228568103] [2021-05-02 18:08:59,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228568103] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:59,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:59,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 18:08:59,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65268678] [2021-05-02 18:08:59,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:08:59,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:59,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:08:59,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 18:08:59,740 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) [2021-05-02 18:08:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:59,979 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 18:08:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 18:08:59,980 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 [2021-05-02 18:08:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:59,983 INFO L225 Difference]: With dead ends: 34 [2021-05-02 18:08:59,983 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 18:08:59,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 18:08:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 18:08:59,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 18:08:59,995 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) [2021-05-02 18:08:59,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 18:08:59,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2021-05-02 18:08:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:00,000 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 18:09:00,000 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) [2021-05-02 18:09:00,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 18:09:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:09:00,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:00,002 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] [2021-05-02 18:09:00,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:09:00,003 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:00,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1077134525, now seen corresponding path program 1 times [2021-05-02 18:09:00,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:00,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854282081] [2021-05-02 18:09:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 18:09:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:00,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854282081] [2021-05-02 18:09:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854282081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:00,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:00,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:09:00,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007703057] [2021-05-02 18:09:00,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:09:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:00,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:09:00,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:09:00,137 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) [2021-05-02 18:09:00,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:00,453 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-05-02 18:09:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:09:00,454 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 [2021-05-02 18:09:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:00,456 INFO L225 Difference]: With dead ends: 47 [2021-05-02 18:09:00,457 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 18:09:00,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:09:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 18:09:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-05-02 18:09:00,469 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) [2021-05-02 18:09:00,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-05-02 18:09:00,473 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 21 [2021-05-02 18:09:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:00,473 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-05-02 18:09:00,473 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) [2021-05-02 18:09:00,474 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-05-02 18:09:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 18:09:00,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:00,475 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] [2021-05-02 18:09:00,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 18:09:00,475 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash -2113482804, now seen corresponding path program 1 times [2021-05-02 18:09:00,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:00,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015771079] [2021-05-02 18:09:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:09:00,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:00,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015771079] [2021-05-02 18:09:00,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015771079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:00,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:00,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 18:09:00,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267984062] [2021-05-02 18:09:00,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 18:09:00,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:00,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 18:09:00,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 18:09:00,634 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) [2021-05-02 18:09:00,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:00,957 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2021-05-02 18:09:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:09:00,958 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 [2021-05-02 18:09:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:00,960 INFO L225 Difference]: With dead ends: 54 [2021-05-02 18:09:00,960 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 18:09:00,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:09:00,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 18:09:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-05-02 18:09:00,970 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) [2021-05-02 18:09:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2021-05-02 18:09:00,972 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 60 transitions. Word has length 29 [2021-05-02 18:09:00,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:00,972 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 60 transitions. [2021-05-02 18:09:00,972 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) [2021-05-02 18:09:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 60 transitions. [2021-05-02 18:09:00,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 18:09:00,974 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:00,974 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] [2021-05-02 18:09:00,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 18:09:00,974 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:00,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:00,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1308577884, now seen corresponding path program 1 times [2021-05-02 18:09:00,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:00,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279678941] [2021-05-02 18:09:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 18:09:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 18:09:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 18:09:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:09:01,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:01,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279678941] [2021-05-02 18:09:01,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279678941] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:01,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:01,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:09:01,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182413818] [2021-05-02 18:09:01,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:09:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:09:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:09:01,116 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) [2021-05-02 18:09:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:01,489 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2021-05-02 18:09:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:09:01,490 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 [2021-05-02 18:09:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:01,491 INFO L225 Difference]: With dead ends: 73 [2021-05-02 18:09:01,491 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 18:09:01,492 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:09:01,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 18:09:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-05-02 18:09:01,496 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) [2021-05-02 18:09:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2021-05-02 18:09:01,497 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 32 [2021-05-02 18:09:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:01,498 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2021-05-02 18:09:01,498 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) [2021-05-02 18:09:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2021-05-02 18:09:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 18:09:01,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:01,499 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] [2021-05-02 18:09:01,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 18:09:01,499 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1447644068, now seen corresponding path program 1 times [2021-05-02 18:09:01,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:01,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497953510] [2021-05-02 18:09:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:01,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:01,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:09:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:01,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 18:09:01,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:01,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497953510] [2021-05-02 18:09:01,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497953510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:01,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:01,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 18:09:01,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455118354] [2021-05-02 18:09:01,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:09:01,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:01,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:09:01,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:09:01,587 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) [2021-05-02 18:09:01,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:01,942 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2021-05-02 18:09:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:09:01,942 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 [2021-05-02 18:09:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:01,943 INFO L225 Difference]: With dead ends: 75 [2021-05-02 18:09:01,943 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 18:09:01,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:09:01,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 18:09:01,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-05-02 18:09:01,948 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) [2021-05-02 18:09:01,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-05-02 18:09:01,949 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2021-05-02 18:09:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:01,950 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-05-02 18:09:01,950 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) [2021-05-02 18:09:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-05-02 18:09:01,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 18:09:01,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:01,951 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] [2021-05-02 18:09:01,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 18:09:01,951 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1060067119, now seen corresponding path program 1 times [2021-05-02 18:09:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:01,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82751220] [2021-05-02 18:09:01,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:09:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:09:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 18:09:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 18:09:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 18:09:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 18:09:02,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:02,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82751220] [2021-05-02 18:09:02,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82751220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:02,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126886254] [2021-05-02 18:09:02,115 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 [2021-05-02 18:09:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:02,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 18:09:02,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:02,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 18:09:02,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126886254] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:02,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:02,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-05-02 18:09:02,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711004952] [2021-05-02 18:09:02,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 18:09:02,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 18:09:02,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:09:02,713 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 18:09:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:03,341 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2021-05-02 18:09:03,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:09:03,341 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 57 [2021-05-02 18:09:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:03,342 INFO L225 Difference]: With dead ends: 90 [2021-05-02 18:09:03,343 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 18:09:03,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-05-02 18:09:03,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 18:09:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-05-02 18:09:03,349 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) [2021-05-02 18:09:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2021-05-02 18:09:03,350 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 57 [2021-05-02 18:09:03,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:03,350 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2021-05-02 18:09:03,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 6 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 18:09:03,350 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2021-05-02 18:09:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 18:09:03,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:03,352 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] [2021-05-02 18:09:03,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 18:09:03,565 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1512463065, now seen corresponding path program 1 times [2021-05-02 18:09:03,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:03,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42972024] [2021-05-02 18:09:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:09:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:09:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:09:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:09:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 18:09:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 18:09:03,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42972024] [2021-05-02 18:09:03,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42972024] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:03,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503833618] [2021-05-02 18:09:03,686 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 [2021-05-02 18:09:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:03,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 18:09:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-02 18:09:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503833618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:03,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:03,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-05-02 18:09:03,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763019519] [2021-05-02 18:09:03,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:09:03,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:09:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:09:03,997 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) [2021-05-02 18:09:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:04,437 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-05-02 18:09:04,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:09:04,438 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 [2021-05-02 18:09:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:04,440 INFO L225 Difference]: With dead ends: 92 [2021-05-02 18:09:04,440 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 18:09:04,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 260.4ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-05-02 18:09:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 18:09:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2021-05-02 18:09:04,457 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) [2021-05-02 18:09:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-05-02 18:09:04,460 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 59 [2021-05-02 18:09:04,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:04,461 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-05-02 18:09:04,462 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) [2021-05-02 18:09:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-05-02 18:09:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 18:09:04,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:04,465 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] [2021-05-02 18:09:04,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 18:09:04,681 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 133870084, now seen corresponding path program 2 times [2021-05-02 18:09:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:04,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411750077] [2021-05-02 18:09:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:04,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:09:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:09:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:09:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:09:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 18:09:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-02 18:09:04,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-05-02 18:09:04,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-05-02 18:09:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-05-02 18:09:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:04,862 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 18:09:04,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411750077] [2021-05-02 18:09:04,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411750077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:04,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256964239] [2021-05-02 18:09:04,862 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 [2021-05-02 18:09:04,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:09:04,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:09:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 18:09:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:04,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:04,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:04,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:04,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:04,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 44 proven. 45 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-05-02 18:09:05,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256964239] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:05,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:05,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-05-02 18:09:05,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980261190] [2021-05-02 18:09:05,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:09:05,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:05,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:09:05,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:09:05,178 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 18:09:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:05,796 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-05-02 18:09:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 18:09:05,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 82 [2021-05-02 18:09:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:05,800 INFO L225 Difference]: With dead ends: 91 [2021-05-02 18:09:05,800 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 18:09:05,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-05-02 18:09:05,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 18:09:05,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-02 18:09:05,804 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) [2021-05-02 18:09:05,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2021-05-02 18:09:05,805 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 82 [2021-05-02 18:09:05,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:05,805 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2021-05-02 18:09:05,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 18:09:05,806 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2021-05-02 18:09:05,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 18:09:05,807 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:05,807 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] [2021-05-02 18:09:06,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 18:09:06,021 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:06,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:06,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1765383868, now seen corresponding path program 2 times [2021-05-02 18:09:06,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:06,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292467930] [2021-05-02 18:09:06,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 18:09:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-05-02 18:09:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-05-02 18:09:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:09:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 18:09:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 18:09:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 18:09:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-05-02 18:09:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-05-02 18:09:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-05-02 18:09:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-05-02 18:09:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-02 18:09:06,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292467930] [2021-05-02 18:09:06,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292467930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:06,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448773143] [2021-05-02 18:09:06,216 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 [2021-05-02 18:09:06,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 18:09:06,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:09:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 18:09:06,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 44 proven. 59 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-05-02 18:09:06,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448773143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:06,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:06,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-05-02 18:09:06,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610899939] [2021-05-02 18:09:06,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:09:06,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:06,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:09:06,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:09:06,727 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 18:09:07,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:07,771 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2021-05-02 18:09:07,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 18:09:07,772 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 84 [2021-05-02 18:09:07,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:07,772 INFO L225 Difference]: With dead ends: 93 [2021-05-02 18:09:07,772 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:09:07,773 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 847.6ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 18:09:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:09:07,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:09:07,774 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) [2021-05-02 18:09:07,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:09:07,774 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2021-05-02 18:09:07,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:07,774 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:09:07,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 8 states have call successors, (23), 4 states have call predecessors, (23), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2021-05-02 18:09:07,774 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:09:07,774 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:09:07,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:07,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:07 BasicIcfg [2021-05-02 18:09:07,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:09:07,989 INFO L168 Benchmark]: Toolchain (without parser) took 9580.31 ms. Allocated memory was 197.1 MB in the beginning and 310.4 MB in the end (delta: 113.2 MB). Free memory was 162.0 MB in the beginning and 252.8 MB in the end (delta: -90.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 178.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.74 ms. Allocated memory is still 197.1 MB. Free memory was 161.8 MB in the beginning and 180.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: Boogie Preprocessor took 43.57 ms. Allocated memory is still 197.1 MB. Free memory was 180.1 MB in the beginning and 178.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: RCFGBuilder took 407.94 ms. Allocated memory is still 197.1 MB. Free memory was 178.5 MB in the beginning and 161.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: IcfgTransformer took 22.47 ms. Allocated memory is still 197.1 MB. Free memory was 161.7 MB in the beginning and 160.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,989 INFO L168 Benchmark]: TraceAbstraction took 8869.72 ms. Allocated memory was 197.1 MB in the beginning and 310.4 MB in the end (delta: 113.2 MB). Free memory was 160.2 MB in the beginning and 252.8 MB in the end (delta: -92.7 MB). Peak memory consumption was 21.6 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:07,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 197.1 MB. Free memory is still 178.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 227.74 ms. Allocated memory is still 197.1 MB. Free memory was 161.8 MB in the beginning and 180.1 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.57 ms. Allocated memory is still 197.1 MB. Free memory was 180.1 MB in the beginning and 178.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 407.94 ms. Allocated memory is still 197.1 MB. Free memory was 178.5 MB in the beginning and 161.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 22.47 ms. Allocated memory is still 197.1 MB. Free memory was 161.7 MB in the beginning and 160.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8869.72 ms. Allocated memory was 197.1 MB in the beginning and 310.4 MB in the end (delta: 113.2 MB). Free memory was 160.2 MB in the beginning and 252.8 MB in the end (delta: -92.7 MB). Peak memory consumption was 21.6 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: 8812.6ms, OverallIterations: 10, TraceHistogramMax: 12, EmptinessCheckTime: 21.7ms, AutomataDifference: 4478.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 296 SDtfs, 628 SDslu, 653 SDs, 0 SdLazy, 2114 SolverSat, 725 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1869.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 547 GetRequests, 375 SyntacticMatches, 7 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 2869.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=8, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 101.8ms AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 67.4ms SsaConstructionTime, 240.6ms SatisfiabilityAnalysisTime, 2746.4ms InterpolantComputationTime, 711 NumberOfCodeBlocks, 711 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 697 ConstructedInterpolants, 0 QuantifiedInterpolants, 2614 SizeOfPredicates, 15 NumberOfNonLiveVariables, 740 ConjunctsInSsa, 77 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 1322/1508 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...