/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:26:59,715 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:26:59,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:26:59,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:26:59,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:26:59,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:26:59,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:26:59,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:26:59,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:26:59,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:26:59,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:26:59,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:26:59,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:26:59,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:26:59,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:26:59,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:26:59,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:26:59,818 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:26:59,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:26:59,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:26:59,821 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:26:59,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:26:59,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:26:59,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:26:59,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:26:59,852 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:26:59,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:26:59,853 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:26:59,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:26:59,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:26:59,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:26:59,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:26:59,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:26:59,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:26:59,855 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:26:59,855 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:26:59,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:26:59,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:26:59,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:26:59,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:26:59,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:26:59,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:26:59,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:26:59,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:26:59,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:26:59,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:26:59,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:26:59,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:26:59,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:26:59,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:27:00,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:27:00,268 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:27:00,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:27:00,273 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:27:00,273 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:27:00,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-02-21 16:27:00,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8687caa5/bbd32def57fe477dade82182bc5b3ec0/FLAGbe3f40a42 [2021-02-21 16:27:00,929 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:27:00,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i [2021-02-21 16:27:00,943 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8687caa5/bbd32def57fe477dade82182bc5b3ec0/FLAGbe3f40a42 [2021-02-21 16:27:01,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8687caa5/bbd32def57fe477dade82182bc5b3ec0 [2021-02-21 16:27:01,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:27:01,342 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:27:01,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:27:01,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:27:01,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:27:01,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52eba860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01, skipping insertion in model container [2021-02-21 16:27:01,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:27:01,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:27:01,619 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-02-21 16:27:01,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:27:01,667 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:27:01,682 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/SpamAssassin-loop.i[893,906] [2021-02-21 16:27:01,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:27:01,708 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:27:01,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01 WrapperNode [2021-02-21 16:27:01,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:27:01,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:27:01,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:27:01,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:27:01,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,732 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... [2021-02-21 16:27:01,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:27:01,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:27:01,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:27:01,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:27:01,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:27:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:27:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:27:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:27:01,856 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:27:01,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 16:27:01,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:27:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:27:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:27:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 16:27:01,857 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 16:27:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:27:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:27:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:27:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 16:27:01,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:27:01,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:27:01,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:27:02,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:27:02,273 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-21 16:27:02,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:27:02 BoogieIcfgContainer [2021-02-21 16:27:02,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:27:02,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:27:02,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:27:02,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:27:02,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:27:01" (1/3) ... [2021-02-21 16:27:02,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211b0321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:27:02, skipping insertion in model container [2021-02-21 16:27:02,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:27:01" (2/3) ... [2021-02-21 16:27:02,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211b0321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:27:02, skipping insertion in model container [2021-02-21 16:27:02,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:27:02" (3/3) ... [2021-02-21 16:27:02,284 INFO L111 eAbstractionObserver]: Analyzing ICFG SpamAssassin-loop.i [2021-02-21 16:27:02,291 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:27:02,296 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:27:02,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:27:02,338 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:27:02,338 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:27:02,338 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:27:02,338 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:27:02,338 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:27:02,339 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:27:02,339 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:27:02,339 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:27:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2021-02-21 16:27:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:27:02,362 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:02,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:27:02,363 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1772946259, now seen corresponding path program 1 times [2021-02-21 16:27:02,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:02,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841590645] [2021-02-21 16:27:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:02,588 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:02,592 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,593 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:02,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-02-21 16:27:02,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:02,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:02,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:02,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:02,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:02,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:27:02,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841590645] [2021-02-21 16:27:02,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:02,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:27:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672321217] [2021-02-21 16:27:02,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:27:02,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:27:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:27:02,706 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 6 states. [2021-02-21 16:27:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:03,168 INFO L93 Difference]: Finished difference Result 88 states and 155 transitions. [2021-02-21 16:27:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:27:03,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-21 16:27:03,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:03,181 INFO L225 Difference]: With dead ends: 88 [2021-02-21 16:27:03,182 INFO L226 Difference]: Without dead ends: 47 [2021-02-21 16:27:03,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:27:03,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-02-21 16:27:03,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2021-02-21 16:27:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-02-21 16:27:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-02-21 16:27:03,250 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2021-02-21 16:27:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:03,251 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-02-21 16:27:03,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:27:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-02-21 16:27:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:27:03,253 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:03,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:27:03,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:27:03,253 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:03,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1794902226, now seen corresponding path program 1 times [2021-02-21 16:27:03,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:03,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111822748] [2021-02-21 16:27:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:03,357 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,358 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,361 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,362 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:03,370 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,370 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:03,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:03,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:03,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:27:03,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111822748] [2021-02-21 16:27:03,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:03,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:27:03,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919688778] [2021-02-21 16:27:03,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:27:03,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:27:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:27:03,451 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand 6 states. [2021-02-21 16:27:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:03,758 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2021-02-21 16:27:03,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:27:03,759 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-21 16:27:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:03,762 INFO L225 Difference]: With dead ends: 55 [2021-02-21 16:27:03,762 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 16:27:03,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:27:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 16:27:03,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2021-02-21 16:27:03,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-02-21 16:27:03,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 67 transitions. [2021-02-21 16:27:03,779 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 67 transitions. Word has length 14 [2021-02-21 16:27:03,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:03,779 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 67 transitions. [2021-02-21 16:27:03,779 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:27:03,779 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 67 transitions. [2021-02-21 16:27:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:27:03,780 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:03,780 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:27:03,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:27:03,781 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:03,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1560251136, now seen corresponding path program 1 times [2021-02-21 16:27:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:03,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032384323] [2021-02-21 16:27:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:03,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,827 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,833 WARN L141 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size [2021-02-21 16:27:03,834 WARN L147 QuantifierPusher]: treesize reduction 9, result has 25.0 percent of original size 3 [2021-02-21 16:27:03,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:03,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:03,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:03,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,875 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:03,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:03,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:27:03,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032384323] [2021-02-21 16:27:03,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:03,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:27:03,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237303441] [2021-02-21 16:27:03,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:27:03,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:03,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:27:03,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:27:03,886 INFO L87 Difference]: Start difference. First operand 51 states and 67 transitions. Second operand 6 states. [2021-02-21 16:27:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:04,182 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-02-21 16:27:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:27:04,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-02-21 16:27:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:04,185 INFO L225 Difference]: With dead ends: 57 [2021-02-21 16:27:04,185 INFO L226 Difference]: Without dead ends: 55 [2021-02-21 16:27:04,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:27:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-02-21 16:27:04,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-02-21 16:27:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-02-21 16:27:04,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-02-21 16:27:04,201 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 19 [2021-02-21 16:27:04,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:04,201 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-02-21 16:27:04,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:27:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-02-21 16:27:04,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-02-21 16:27:04,203 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:04,203 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:27:04,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:27:04,204 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:04,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1084781042, now seen corresponding path program 1 times [2021-02-21 16:27:04,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:04,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200537777] [2021-02-21 16:27:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,251 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,252 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:04,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:04,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:04,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:04,270 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,271 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:04,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,327 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,328 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,341 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,342 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 16:27:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-21 16:27:04,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200537777] [2021-02-21 16:27:04,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:04,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:27:04,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798835433] [2021-02-21 16:27:04,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:27:04,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:27:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:27:04,355 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 7 states. [2021-02-21 16:27:04,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:04,693 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-02-21 16:27:04,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:27:04,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-02-21 16:27:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:04,696 INFO L225 Difference]: With dead ends: 61 [2021-02-21 16:27:04,696 INFO L226 Difference]: Without dead ends: 59 [2021-02-21 16:27:04,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-02-21 16:27:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-02-21 16:27:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-02-21 16:27:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-21 16:27:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-02-21 16:27:04,730 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 24 [2021-02-21 16:27:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:04,736 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-02-21 16:27:04,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:27:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-02-21 16:27:04,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:27:04,739 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:04,739 INFO L422 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] [2021-02-21 16:27:04,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:27:04,739 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:04,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:04,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1893905473, now seen corresponding path program 1 times [2021-02-21 16:27:04,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:04,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467488017] [2021-02-21 16:27:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,817 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,820 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-21 16:27:04,821 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-21 16:27:04,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:04,830 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:04,835 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:04,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 16:27:04,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,889 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,889 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-02-21 16:27:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:04,894 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:04,894 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-02-21 16:27:04,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467488017] [2021-02-21 16:27:04,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:04,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:27:04,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279412307] [2021-02-21 16:27:04,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:27:04,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:04,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:27:04,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:27:04,898 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 6 states. [2021-02-21 16:27:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:05,134 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-02-21 16:27:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-21 16:27:05,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-02-21 16:27:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:05,136 INFO L225 Difference]: With dead ends: 66 [2021-02-21 16:27:05,136 INFO L226 Difference]: Without dead ends: 64 [2021-02-21 16:27:05,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:27:05,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-02-21 16:27:05,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-02-21 16:27:05,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-21 16:27:05,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-02-21 16:27:05,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 29 [2021-02-21 16:27:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:05,150 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-02-21 16:27:05,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:27:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-02-21 16:27:05,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-21 16:27:05,152 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:05,152 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:27:05,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:27:05,153 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:05,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:05,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1991737873, now seen corresponding path program 1 times [2021-02-21 16:27:05,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:05,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996410604] [2021-02-21 16:27:05,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:05,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:05,205 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,206 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:05,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,214 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:05,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,250 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 16:27:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 16:27:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-21 16:27:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,264 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,265 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 16:27:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 16:27:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,274 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,274 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-02-21 16:27:05,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996410604] [2021-02-21 16:27:05,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:05,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:27:05,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936637921] [2021-02-21 16:27:05,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:27:05,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:27:05,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:27:05,280 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 7 states. [2021-02-21 16:27:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:05,584 INFO L93 Difference]: Finished difference Result 75 states and 91 transitions. [2021-02-21 16:27:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:27:05,584 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2021-02-21 16:27:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:05,586 INFO L225 Difference]: With dead ends: 75 [2021-02-21 16:27:05,586 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 16:27:05,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-21 16:27:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 16:27:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2021-02-21 16:27:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-02-21 16:27:05,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2021-02-21 16:27:05,599 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 47 [2021-02-21 16:27:05,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:05,600 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2021-02-21 16:27:05,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:27:05,600 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2021-02-21 16:27:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-21 16:27:05,602 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:05,602 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 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] [2021-02-21 16:27:05,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:27:05,602 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:05,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:05,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1947441265, now seen corresponding path program 1 times [2021-02-21 16:27:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:05,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893361066] [2021-02-21 16:27:05,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,637 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,638 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:05,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:05,646 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:05,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:05,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,656 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:05,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,690 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 16:27:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,697 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 16:27:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,704 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-21 16:27:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 16:27:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,712 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,713 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 16:27:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,716 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,717 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 16:27:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-21 16:27:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:05,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:05,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-02-21 16:27:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893361066] [2021-02-21 16:27:05,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:05,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 16:27:05,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804737306] [2021-02-21 16:27:05,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-21 16:27:05,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:05,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-21 16:27:05,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-21 16:27:05,732 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 8 states. [2021-02-21 16:27:06,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:06,090 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-02-21 16:27:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:27:06,090 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2021-02-21 16:27:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:06,092 INFO L225 Difference]: With dead ends: 75 [2021-02-21 16:27:06,092 INFO L226 Difference]: Without dead ends: 73 [2021-02-21 16:27:06,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-02-21 16:27:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-02-21 16:27:06,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-02-21 16:27:06,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-02-21 16:27:06,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2021-02-21 16:27:06,105 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 57 [2021-02-21 16:27:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:06,106 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2021-02-21 16:27:06,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-21 16:27:06,106 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2021-02-21 16:27:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-02-21 16:27:06,107 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:27:06,108 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1, 1, 1] [2021-02-21 16:27:06,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:27:06,108 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:27:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:27:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1358511123, now seen corresponding path program 1 times [2021-02-21 16:27:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:27:06,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649300894] [2021-02-21 16:27:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:27:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,160 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:06,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:06,167 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,167 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:06,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 16:27:06,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:06,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,183 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:27:06,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:27:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,213 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,215 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-02-21 16:27:06,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,219 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-21 16:27:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-21 16:27:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,229 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,230 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-21 16:27:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-21 16:27:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,247 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,248 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-02-21 16:27:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,255 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,256 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 16:27:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,262 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,263 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-02-21 16:27:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-21 16:27:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,278 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,278 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-02-21 16:27:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:27:06,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:27:06,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:27:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-02-21 16:27:06,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649300894] [2021-02-21 16:27:06,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:27:06,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 16:27:06,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633198524] [2021-02-21 16:27:06,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 16:27:06,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:27:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 16:27:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:27:06,300 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 9 states. [2021-02-21 16:27:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:27:06,733 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-02-21 16:27:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-21 16:27:06,734 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 68 [2021-02-21 16:27:06,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:27:06,735 INFO L225 Difference]: With dead ends: 73 [2021-02-21 16:27:06,735 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:27:06,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-02-21 16:27:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:27:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:27:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:27:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:27:06,737 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2021-02-21 16:27:06,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:27:06,737 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:27:06,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 16:27:06,737 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:27:06,737 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:27:06,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:27:06,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:27:07,533 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-02-21 16:27:07,533 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-02-21 16:27:07,533 INFO L189 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-02-21 16:27:07,534 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:27:07,534 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L192 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-02-21 16:27:07,535 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-02-21 16:27:07,535 INFO L185 CegarLoopUtils]: At program point L35-2(lines 35 64) the Hoare annotation is: (and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,535 INFO L189 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-02-21 16:27:07,536 INFO L189 CegarLoopUtils]: For program point L60(line 60) no Hoare annotation was computed. [2021-02-21 16:27:07,536 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 24 67) no Hoare annotation was computed. [2021-02-21 16:27:07,536 INFO L185 CegarLoopUtils]: At program point L56(lines 36 63) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,536 INFO L185 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,536 INFO L185 CegarLoopUtils]: At program point L52-1(line 52) the Hoare annotation is: (and (<= (+ main_~j~0 3) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,536 INFO L185 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,537 INFO L185 CegarLoopUtils]: At program point L40(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,537 INFO L185 CegarLoopUtils]: At program point L40-1(line 40) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,537 INFO L189 CegarLoopUtils]: For program point L36(lines 36 63) no Hoare annotation was computed. [2021-02-21 16:27:07,537 INFO L185 CegarLoopUtils]: At program point L57(line 57) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,537 INFO L189 CegarLoopUtils]: For program point L53(line 53) no Hoare annotation was computed. [2021-02-21 16:27:07,537 INFO L189 CegarLoopUtils]: For program point L49(line 49) no Hoare annotation was computed. [2021-02-21 16:27:07,538 INFO L185 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,538 INFO L185 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,538 INFO L185 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,538 INFO L185 CegarLoopUtils]: At program point L58(line 58) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,538 INFO L185 CegarLoopUtils]: At program point L46(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,539 INFO L185 CegarLoopUtils]: At program point L46-1(line 46) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,539 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 24 67) no Hoare annotation was computed. [2021-02-21 16:27:07,539 INFO L185 CegarLoopUtils]: At program point L42(line 42) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (<= 0 main_~i~0) (< (+ main_~i~0 1) main_~len~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,539 INFO L189 CegarLoopUtils]: For program point L38(line 38) no Hoare annotation was computed. [2021-02-21 16:27:07,539 INFO L185 CegarLoopUtils]: At program point L34-2(lines 34 65) the Hoare annotation is: (and (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,539 INFO L189 CegarLoopUtils]: For program point L34-3(lines 34 65) no Hoare annotation was computed. [2021-02-21 16:27:07,539 INFO L192 CegarLoopUtils]: At program point mainENTRY(lines 24 67) the Hoare annotation is: true [2021-02-21 16:27:07,540 INFO L185 CegarLoopUtils]: At program point L59(line 59) the Hoare annotation is: (and (<= (+ main_~j~0 5) main_~bufsize~0) (<= 0 main_~j~0) (< main_~i~0 main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,540 INFO L185 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (and (<= 0 main_~j~0) (<= (+ main_~i~0 1) main_~len~0) (<= 0 main_~i~0) (<= (+ main_~limit~0 4) main_~bufsize~0) (<= (+ main_~j~0 4) main_~bufsize~0)) [2021-02-21 16:27:07,540 INFO L189 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-02-21 16:27:07,540 INFO L189 CegarLoopUtils]: For program point L39(line 39) no Hoare annotation was computed. [2021-02-21 16:27:07,540 INFO L189 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-02-21 16:27:07,540 INFO L192 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-02-21 16:27:07,540 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-02-21 16:27:07,540 INFO L189 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-02-21 16:27:07,541 INFO L189 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-02-21 16:27:07,541 INFO L189 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-02-21 16:27:07,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:27:07 BoogieIcfgContainer [2021-02-21 16:27:07,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:27:07,566 INFO L168 Benchmark]: Toolchain (without parser) took 6234.29 ms. Allocated memory was 158.3 MB in the beginning and 244.3 MB in the end (delta: 86.0 MB). Free memory was 133.9 MB in the beginning and 102.2 MB in the end (delta: 31.7 MB). Peak memory consumption was 117.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:27:07,568 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 158.3 MB. Free memory is still 132.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:27:07,568 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.17 ms. Allocated memory is still 158.3 MB. Free memory was 132.8 MB in the beginning and 122.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:27:07,569 INFO L168 Benchmark]: Boogie Preprocessor took 40.07 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:27:07,570 INFO L168 Benchmark]: RCFGBuilder took 524.83 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 138.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:27:07,574 INFO L168 Benchmark]: TraceAbstraction took 5284.57 ms. Allocated memory was 158.3 MB in the beginning and 244.3 MB in the end (delta: 86.0 MB). Free memory was 137.6 MB in the beginning and 102.2 MB in the end (delta: 35.4 MB). Peak memory consumption was 121.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:27:07,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 158.3 MB. Free memory is still 132.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 362.17 ms. Allocated memory is still 158.3 MB. Free memory was 132.8 MB in the beginning and 122.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.07 ms. Allocated memory is still 158.3 MB. Free memory was 122.6 MB in the beginning and 121.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 524.83 ms. Allocated memory is still 158.3 MB. Free memory was 121.1 MB in the beginning and 138.1 MB in the end (delta: -17.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5284.57 ms. Allocated memory was 158.3 MB in the beginning and 244.3 MB in the end (delta: 86.0 MB). Free memory was 137.6 MB in the beginning and 102.2 MB in the end (delta: 35.4 MB). Peak memory consumption was 121.4 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (0 <= j && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((j + 5 <= bufsize && 0 <= j) && i < len) && 0 <= i) && limit + 4 <= bufsize - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 <= i && limit + 4 <= bufsize - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 8, TraceHistogramMax: 11, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 286 SDtfs, 247 SDslu, 491 SDs, 0 SdLazy, 1162 SolverSat, 485 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 169 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 23 LocationsWithAnnotation, 55 PreInvPairs, 76 NumberOfFragments, 384 HoareAnnotationTreeSize, 55 FomulaSimplifications, 3224 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 23 FomulaSimplificationsInter, 697 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 30858 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 428/428 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...