/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-simple/nested_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:06:24,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:06:24,037 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:06:24,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 19:06:24,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:06:24,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:06:24,121 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:06:24,128 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:06:24,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:06:24,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:06:24,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:06:24,149 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:06:24,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:06:24,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:06:24,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:06:24,151 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:06:24,151 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:06:24,152 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:06:24,152 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:06:24,457 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:06:24,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:06:24,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:06:24,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:06:24,474 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:06:24,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_4.c [2021-05-02 19:06:24,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94523924/1aa5cdd545b44bcc9fca02fa5a838b03/FLAG4c315267c [2021-05-02 19:06:24,894 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:06:24,895 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c [2021-05-02 19:06:24,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94523924/1aa5cdd545b44bcc9fca02fa5a838b03/FLAG4c315267c [2021-05-02 19:06:25,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b94523924/1aa5cdd545b44bcc9fca02fa5a838b03 [2021-05-02 19:06:25,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:06:25,347 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:06:25,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:06:25,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:06:25,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:06:25,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55535717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25, skipping insertion in model container [2021-05-02 19:06:25,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:06:25,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:06:25,445 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c[841,854] [2021-05-02 19:06:25,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:06:25,453 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:06:25,462 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_4.c[841,854] [2021-05-02 19:06:25,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:06:25,471 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:06:25,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25 WrapperNode [2021-05-02 19:06:25,471 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:06:25,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:06:25,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:06:25,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:06:25,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:06:25,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:06:25,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:06:25,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:06:25,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:06:25,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:06:25,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:06:25,613 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:06:25,613 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:06:25,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:06:25,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:06:25,755 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 19:06:25,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:06:25 BoogieIcfgContainer [2021-05-02 19:06:25,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:06:25,757 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:06:25,757 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:06:25,757 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:06:25,759 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:06:25" (1/1) ... [2021-05-02 19:06:25,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:06:25 BasicIcfg [2021-05-02 19:06:25,770 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:06:25,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:06:25,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:06:25,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:06:25,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:06:25" (1/4) ... [2021-05-02 19:06:25,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2323dd13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:06:25, skipping insertion in model container [2021-05-02 19:06:25,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:06:25" (2/4) ... [2021-05-02 19:06:25,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2323dd13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:06:25, skipping insertion in model container [2021-05-02 19:06:25,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:06:25" (3/4) ... [2021-05-02 19:06:25,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2323dd13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:06:25, skipping insertion in model container [2021-05-02 19:06:25,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:06:25" (4/4) ... [2021-05-02 19:06:25,776 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.cJordan [2021-05-02 19:06:25,779 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:06:25,782 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:06:25,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:06:25,838 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:06:25,838 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:06:25,838 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:06:25,838 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:06:25,838 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:06:25,838 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:06:25,838 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:06:25,838 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:06:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:06:25,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 19:06:25,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:25,852 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:25,853 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash 333267445, now seen corresponding path program 1 times [2021-05-02 19:06:25,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:25,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765548023] [2021-05-02 19:06:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:25,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765548023] [2021-05-02 19:06:26,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765548023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:06:26,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:06:26,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:06:26,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507517176] [2021-05-02 19:06:26,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:06:26,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:06:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:06:26,016 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,039 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-02 19:06:26,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:06:26,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 19:06:26,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,045 INFO L225 Difference]: With dead ends: 22 [2021-05-02 19:06:26,045 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 19:06:26,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:06:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 19:06:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 19:06:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-05-02 19:06:26,067 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2021-05-02 19:06:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,068 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-05-02 19:06:26,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-05-02 19:06:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-02 19:06:26,068 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,068 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:26,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:06:26,069 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:26,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:26,069 INFO L82 PathProgramCache]: Analyzing trace with hash 333268406, now seen corresponding path program 1 times [2021-05-02 19:06:26,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:26,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637180507] [2021-05-02 19:06:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:26,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637180507] [2021-05-02 19:06:26,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637180507] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:06:26,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:06:26,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:06:26,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211436596] [2021-05-02 19:06:26,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:06:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:06:26,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:06:26,140 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,191 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-05-02 19:06:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:06:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-05-02 19:06:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,192 INFO L225 Difference]: With dead ends: 25 [2021-05-02 19:06:26,192 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 19:06:26,193 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:06:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 19:06:26,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-05-02 19:06:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 19:06:26,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2021-05-02 19:06:26,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,197 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 19:06:26,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 19:06:26,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 19:06:26,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,198 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:26,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:06:26,198 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:26,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1533738596, now seen corresponding path program 1 times [2021-05-02 19:06:26,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:26,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002465161] [2021-05-02 19:06:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002465161] [2021-05-02 19:06:26,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002465161] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:06:26,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:06:26,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:06:26,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773778703] [2021-05-02 19:06:26,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:06:26,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:06:26,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:06:26,253 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,300 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2021-05-02 19:06:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:06:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 19:06:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,301 INFO L225 Difference]: With dead ends: 24 [2021-05-02 19:06:26,301 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 19:06:26,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:06:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 19:06:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-05-02 19:06:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-05-02 19:06:26,303 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2021-05-02 19:06:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,303 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-05-02 19:06:26,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-05-02 19:06:26,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 19:06:26,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,304 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:26,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 19:06:26,304 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:26,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:26,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2089193463, now seen corresponding path program 1 times [2021-05-02 19:06:26,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:26,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861580854] [2021-05-02 19:06:26,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861580854] [2021-05-02 19:06:26,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861580854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:06:26,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:06:26,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:06:26,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49074617] [2021-05-02 19:06:26,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:06:26,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:06:26,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:06:26,351 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,394 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-05-02 19:06:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:06:26,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 19:06:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,395 INFO L225 Difference]: With dead ends: 23 [2021-05-02 19:06:26,395 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 19:06:26,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:06:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 19:06:26,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-05-02 19:06:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 19:06:26,397 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2021-05-02 19:06:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,397 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 19:06:26,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 19:06:26,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:06:26,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,398 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:26,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 19:06:26,398 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:26,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:26,399 INFO L82 PathProgramCache]: Analyzing trace with hash 529097968, now seen corresponding path program 1 times [2021-05-02 19:06:26,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:26,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319531616] [2021-05-02 19:06:26,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319531616] [2021-05-02 19:06:26,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319531616] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:06:26,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:06:26,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:06:26,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905316451] [2021-05-02 19:06:26,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:06:26,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:06:26,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:06:26,443 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,487 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-05-02 19:06:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:06:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 19:06:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,488 INFO L225 Difference]: With dead ends: 22 [2021-05-02 19:06:26,488 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 19:06:26,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:06:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 19:06:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 19:06:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-05-02 19:06:26,490 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 18 [2021-05-02 19:06:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,491 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-05-02 19:06:26,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-05-02 19:06:26,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 19:06:26,491 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,491 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:26,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 19:06:26,491 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:26,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash -336933522, now seen corresponding path program 1 times [2021-05-02 19:06:26,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:26,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473646050] [2021-05-02 19:06:26,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473646050] [2021-05-02 19:06:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473646050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110135927] [2021-05-02 19:06:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 19:06:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:26,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:26,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110135927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:26,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:26,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 19:06:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549184072] [2021-05-02 19:06:26,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:06:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:06:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:06:26,737 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:26,825 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 19:06:26,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:06:26,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 19:06:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:26,826 INFO L225 Difference]: With dead ends: 24 [2021-05-02 19:06:26,826 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 19:06:26,827 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:06:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 19:06:26,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 19:06:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-05-02 19:06:26,836 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 20 [2021-05-02 19:06:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:26,836 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-05-02 19:06:26,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-05-02 19:06:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 19:06:26,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:26,838 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:27,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:06:27,041 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:27,042 INFO L82 PathProgramCache]: Analyzing trace with hash 630460012, now seen corresponding path program 2 times [2021-05-02 19:06:27,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:27,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092770158] [2021-05-02 19:06:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:27,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:27,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:06:27,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092770158] [2021-05-02 19:06:27,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092770158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:27,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348309138] [2021-05-02 19:06:27,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:27,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:06:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:06:27,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:27,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:06:27,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348309138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:27,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:27,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-02 19:06:27,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630084241] [2021-05-02 19:06:27,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:06:27,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:27,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:06:27,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:06:27,195 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:27,511 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-05-02 19:06:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:06:27,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 19:06:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:27,513 INFO L225 Difference]: With dead ends: 45 [2021-05-02 19:06:27,513 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 19:06:27,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 268.4ms TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:06:27,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 19:06:27,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2021-05-02 19:06:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:27,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-02 19:06:27,518 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2021-05-02 19:06:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:27,518 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-02 19:06:27,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:27,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-02 19:06:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:06:27,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:27,520 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:27,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:27,736 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:27,737 INFO L82 PathProgramCache]: Analyzing trace with hash -543179479, now seen corresponding path program 3 times [2021-05-02 19:06:27,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:27,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980554474] [2021-05-02 19:06:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:27,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-05-02 19:06:27,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:27,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980554474] [2021-05-02 19:06:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980554474] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665852470] [2021-05-02 19:06:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:27,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 19:06:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:27,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 19:06:27,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:27,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 19:06:27,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665852470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:27,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:27,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-05-02 19:06:27,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228376348] [2021-05-02 19:06:27,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:06:27,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:27,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:06:27,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:06:27,877 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:28,084 INFO L93 Difference]: Finished difference Result 204 states and 234 transitions. [2021-05-02 19:06:28,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:06:28,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 19:06:28,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:28,085 INFO L225 Difference]: With dead ends: 204 [2021-05-02 19:06:28,085 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 19:06:28,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:06:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 19:06:28,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 100. [2021-05-02 19:06:28,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.15625) internal successors, (111), 96 states have internal predecessors, (111), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2021-05-02 19:06:28,092 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 33 [2021-05-02 19:06:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:28,092 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2021-05-02 19:06:28,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2021-05-02 19:06:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 19:06:28,094 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:28,094 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:28,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:28,310 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1873258634, now seen corresponding path program 4 times [2021-05-02 19:06:28,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:28,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776914868] [2021-05-02 19:06:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:28,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:28,394 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-05-02 19:06:28,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:28,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776914868] [2021-05-02 19:06:28,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776914868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:28,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016967557] [2021-05-02 19:06:28,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:28,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:06:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:28,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:06:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-05-02 19:06:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016967557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:28,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:28,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 19:06:28,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383592483] [2021-05-02 19:06:28,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:06:28,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:06:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:06:28,600 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:28,713 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2021-05-02 19:06:28,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:06:28,713 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-05-02 19:06:28,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:28,714 INFO L225 Difference]: With dead ends: 124 [2021-05-02 19:06:28,714 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 19:06:28,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:06:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 19:06:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2021-05-02 19:06:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.1339285714285714) internal successors, (127), 112 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-05-02 19:06:28,719 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 99 [2021-05-02 19:06:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:28,719 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-05-02 19:06:28,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-05-02 19:06:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 19:06:28,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:28,720 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:28,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:28,925 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:28,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:28,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1532366198, now seen corresponding path program 5 times [2021-05-02 19:06:28,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:28,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676915192] [2021-05-02 19:06:28,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:28,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:29,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2021-05-02 19:06:29,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676915192] [2021-05-02 19:06:29,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676915192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:29,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576302363] [2021-05-02 19:06:29,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:29,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 19:06:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:06:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:29,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 19:06:29,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576302363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:29,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:29,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 19:06:29,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162826061] [2021-05-02 19:06:29,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:06:29,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:29,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:06:29,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:06:29,204 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:29,345 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2021-05-02 19:06:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:06:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-05-02 19:06:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:29,346 INFO L225 Difference]: With dead ends: 140 [2021-05-02 19:06:29,346 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 19:06:29,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:06:29,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 19:06:29,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2021-05-02 19:06:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 128 states have (on average 1.1171875) internal successors, (143), 128 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2021-05-02 19:06:29,351 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 115 [2021-05-02 19:06:29,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:29,352 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2021-05-02 19:06:29,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:29,352 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2021-05-02 19:06:29,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 19:06:29,353 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:29,353 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:29,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:06:29,569 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:29,569 INFO L82 PathProgramCache]: Analyzing trace with hash 798933878, now seen corresponding path program 6 times [2021-05-02 19:06:29,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:29,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311890730] [2021-05-02 19:06:29,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2021-05-02 19:06:29,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311890730] [2021-05-02 19:06:29,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311890730] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:29,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527096769] [2021-05-02 19:06:29,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:29,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-05-02 19:06:29,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:06:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-05-02 19:06:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527096769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:29,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:29,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 19:06:29,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810114852] [2021-05-02 19:06:29,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:06:29,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:06:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:29,850 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:30,006 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2021-05-02 19:06:30,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:06:30,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-05-02 19:06:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:30,008 INFO L225 Difference]: With dead ends: 148 [2021-05-02 19:06:30,008 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 19:06:30,008 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:06:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 19:06:30,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2021-05-02 19:06:30,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 144 states have (on average 1.1041666666666667) internal successors, (159), 144 states have internal predecessors, (159), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2021-05-02 19:06:30,013 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 131 [2021-05-02 19:06:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:30,013 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2021-05-02 19:06:30,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2021-05-02 19:06:30,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 19:06:30,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:30,014 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:30,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:30,231 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:30,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:30,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2120058506, now seen corresponding path program 7 times [2021-05-02 19:06:30,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:30,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686708485] [2021-05-02 19:06:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:30,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-05-02 19:06:30,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686708485] [2021-05-02 19:06:30,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686708485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:30,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382482723] [2021-05-02 19:06:30,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:30,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:06:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:30,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:30,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:30,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2021-05-02 19:06:30,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382482723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:30,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:30,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 19:06:30,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702390587] [2021-05-02 19:06:30,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:06:30,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:30,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:06:30,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:06:30,516 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:30,603 INFO L93 Difference]: Finished difference Result 264 states and 286 transitions. [2021-05-02 19:06:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:06:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-05-02 19:06:30,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:30,604 INFO L225 Difference]: With dead ends: 264 [2021-05-02 19:06:30,604 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 19:06:30,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 19:06:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 208. [2021-05-02 19:06:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 204 states have (on average 1.0931372549019607) internal successors, (223), 204 states have internal predecessors, (223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 226 transitions. [2021-05-02 19:06:30,619 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 226 transitions. Word has length 147 [2021-05-02 19:06:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:30,619 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 226 transitions. [2021-05-02 19:06:30,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 226 transitions. [2021-05-02 19:06:30,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-05-02 19:06:30,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:30,623 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:30,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:30,842 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:30,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1078945290, now seen corresponding path program 8 times [2021-05-02 19:06:30,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:30,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483481349] [2021-05-02 19:06:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:30,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-05-02 19:06:30,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483481349] [2021-05-02 19:06:30,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483481349] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:30,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507174365] [2021-05-02 19:06:30,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:31,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:06:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:31,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:06:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2021-05-02 19:06:31,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507174365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:31,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:31,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 19:06:31,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858038453] [2021-05-02 19:06:31,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:06:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:31,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:06:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:06:31,235 INFO L87 Difference]: Start difference. First operand 208 states and 226 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:31,347 INFO L93 Difference]: Finished difference Result 324 states and 350 transitions. [2021-05-02 19:06:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:06:31,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2021-05-02 19:06:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:31,349 INFO L225 Difference]: With dead ends: 324 [2021-05-02 19:06:31,349 INFO L226 Difference]: Without dead ends: 324 [2021-05-02 19:06:31,349 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:06:31,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-02 19:06:31,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 268. [2021-05-02 19:06:31,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 264 states have (on average 1.0871212121212122) internal successors, (287), 264 states have internal predecessors, (287), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2021-05-02 19:06:31,353 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 207 [2021-05-02 19:06:31,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:31,353 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2021-05-02 19:06:31,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2021-05-02 19:06:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-05-02 19:06:31,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:31,355 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:31,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:06:31,571 INFO L428 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:31,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:31,572 INFO L82 PathProgramCache]: Analyzing trace with hash -803541386, now seen corresponding path program 9 times [2021-05-02 19:06:31,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:31,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050275184] [2021-05-02 19:06:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:31,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:31,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2021-05-02 19:06:31,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050275184] [2021-05-02 19:06:31,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050275184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:31,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86656575] [2021-05-02 19:06:31,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:31,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 19:06:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:31,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:06:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:31,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:31,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2021-05-02 19:06:32,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86656575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:32,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:32,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 19:06:32,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499561984] [2021-05-02 19:06:32,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:06:32,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:32,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:06:32,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:06:32,071 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:32,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:32,212 INFO L93 Difference]: Finished difference Result 384 states and 414 transitions. [2021-05-02 19:06:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:06:32,212 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2021-05-02 19:06:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:32,214 INFO L225 Difference]: With dead ends: 384 [2021-05-02 19:06:32,214 INFO L226 Difference]: Without dead ends: 384 [2021-05-02 19:06:32,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:06:32,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-05-02 19:06:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 328. [2021-05-02 19:06:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 324 states have (on average 1.0833333333333333) internal successors, (351), 324 states have internal predecessors, (351), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 354 transitions. [2021-05-02 19:06:32,219 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 354 transitions. Word has length 267 [2021-05-02 19:06:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:32,220 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 354 transitions. [2021-05-02 19:06:32,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 354 transitions. [2021-05-02 19:06:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-05-02 19:06:32,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:32,222 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:32,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:32,436 INFO L428 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1904195850, now seen corresponding path program 10 times [2021-05-02 19:06:32,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:32,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562753129] [2021-05-02 19:06:32,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:32,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-05-02 19:06:32,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562753129] [2021-05-02 19:06:32,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562753129] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:32,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121980720] [2021-05-02 19:06:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:32,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:06:32,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:32,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:06:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:32,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2021-05-02 19:06:32,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121980720] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:32,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:32,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 19:06:32,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684307382] [2021-05-02 19:06:32,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:06:32,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:32,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:06:32,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:32,974 INFO L87 Difference]: Start difference. First operand 328 states and 354 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:33,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:33,171 INFO L93 Difference]: Finished difference Result 388 states and 418 transitions. [2021-05-02 19:06:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:06:33,171 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2021-05-02 19:06:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:33,172 INFO L225 Difference]: With dead ends: 388 [2021-05-02 19:06:33,173 INFO L226 Difference]: Without dead ends: 388 [2021-05-02 19:06:33,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:06:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-05-02 19:06:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2021-05-02 19:06:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 384 states have (on average 1.0807291666666667) internal successors, (415), 384 states have internal predecessors, (415), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 418 transitions. [2021-05-02 19:06:33,177 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 418 transitions. Word has length 327 [2021-05-02 19:06:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:33,178 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 418 transitions. [2021-05-02 19:06:33,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 418 transitions. [2021-05-02 19:06:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-05-02 19:06:33,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:33,181 INFO L523 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:33,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 19:06:33,397 INFO L428 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:33,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1882381450, now seen corresponding path program 11 times [2021-05-02 19:06:33,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349627149] [2021-05-02 19:06:33,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:33,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-05-02 19:06:33,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349627149] [2021-05-02 19:06:33,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349627149] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:33,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108426453] [2021-05-02 19:06:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:33,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-05-02 19:06:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:06:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:33,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:33,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:33,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2021-05-02 19:06:34,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108426453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:34,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:34,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 19:06:34,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093177601] [2021-05-02 19:06:34,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:06:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:06:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:06:34,036 INFO L87 Difference]: Start difference. First operand 388 states and 418 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:34,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:34,131 INFO L93 Difference]: Finished difference Result 758 states and 816 transitions. [2021-05-02 19:06:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:06:34,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2021-05-02 19:06:34,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:34,133 INFO L225 Difference]: With dead ends: 758 [2021-05-02 19:06:34,133 INFO L226 Difference]: Without dead ends: 758 [2021-05-02 19:06:34,133 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 758 states. [2021-05-02 19:06:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 758 to 574. [2021-05-02 19:06:34,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 570 states have (on average 1.0789473684210527) internal successors, (615), 570 states have internal predecessors, (615), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:34,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 618 transitions. [2021-05-02 19:06:34,143 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 618 transitions. Word has length 387 [2021-05-02 19:06:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:34,143 INFO L480 AbstractCegarLoop]: Abstraction has 574 states and 618 transitions. [2021-05-02 19:06:34,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 618 transitions. [2021-05-02 19:06:34,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 574 [2021-05-02 19:06:34,149 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:34,149 INFO L523 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:34,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:06:34,366 INFO L428 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:34,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1451640292, now seen corresponding path program 12 times [2021-05-02 19:06:34,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:34,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223351841] [2021-05-02 19:06:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2021-05-02 19:06:34,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:34,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223351841] [2021-05-02 19:06:34,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223351841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:34,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280761578] [2021-05-02 19:06:34,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:34,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2021-05-02 19:06:34,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 19:06:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:35,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:35,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:35,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:35,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2021-05-02 19:06:35,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280761578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:35,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:35,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2021-05-02 19:06:35,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627984043] [2021-05-02 19:06:35,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:06:35,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:35,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:06:35,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:35,502 INFO L87 Difference]: Start difference. First operand 574 states and 618 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:35,992 INFO L93 Difference]: Finished difference Result 1877 states and 2021 transitions. [2021-05-02 19:06:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 19:06:35,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 573 [2021-05-02 19:06:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:35,997 INFO L225 Difference]: With dead ends: 1877 [2021-05-02 19:06:35,997 INFO L226 Difference]: Without dead ends: 1877 [2021-05-02 19:06:35,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-05-02 19:06:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-05-02 19:06:36,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1135. [2021-05-02 19:06:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1135 states, 1131 states have (on average 1.0778072502210434) internal successors, (1219), 1131 states have internal predecessors, (1219), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1222 transitions. [2021-05-02 19:06:36,018 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1222 transitions. Word has length 573 [2021-05-02 19:06:36,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:36,018 INFO L480 AbstractCegarLoop]: Abstraction has 1135 states and 1222 transitions. [2021-05-02 19:06:36,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 9 states have internal predecessors, (68), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1222 transitions. [2021-05-02 19:06:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2021-05-02 19:06:36,027 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:36,027 INFO L523 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:36,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:06:36,245 INFO L428 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1180992156, now seen corresponding path program 13 times [2021-05-02 19:06:36,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:36,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373223752] [2021-05-02 19:06:36,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-05-02 19:06:36,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373223752] [2021-05-02 19:06:36,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373223752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:36,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870915557] [2021-05-02 19:06:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:36,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:06:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:36,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:36,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2021-05-02 19:06:37,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870915557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:37,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:37,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 19:06:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914658599] [2021-05-02 19:06:37,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:06:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:37,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:06:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:06:37,838 INFO L87 Difference]: Start difference. First operand 1135 states and 1222 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:37,996 INFO L93 Difference]: Finished difference Result 1690 states and 1819 transitions. [2021-05-02 19:06:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:06:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1134 [2021-05-02 19:06:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:38,000 INFO L225 Difference]: With dead ends: 1690 [2021-05-02 19:06:38,000 INFO L226 Difference]: Without dead ends: 1690 [2021-05-02 19:06:38,001 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 1147 GetRequests, 1135 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:06:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-05-02 19:06:38,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1414. [2021-05-02 19:06:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1414 states, 1410 states have (on average 1.0773049645390071) internal successors, (1519), 1410 states have internal predecessors, (1519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:38,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1414 states to 1414 states and 1522 transitions. [2021-05-02 19:06:38,015 INFO L78 Accepts]: Start accepts. Automaton has 1414 states and 1522 transitions. Word has length 1134 [2021-05-02 19:06:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:38,015 INFO L480 AbstractCegarLoop]: Abstraction has 1414 states and 1522 transitions. [2021-05-02 19:06:38,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 8 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1414 states and 1522 transitions. [2021-05-02 19:06:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1414 [2021-05-02 19:06:38,028 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:38,028 INFO L523 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:38,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:06:38,245 INFO L428 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:38,246 INFO L82 PathProgramCache]: Analyzing trace with hash -106313969, now seen corresponding path program 14 times [2021-05-02 19:06:38,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:38,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338380208] [2021-05-02 19:06:38,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:38,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-05-02 19:06:38,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:38,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338380208] [2021-05-02 19:06:38,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338380208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:38,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870866033] [2021-05-02 19:06:38,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:06:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:39,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 2352 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:06:39,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:39,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2021-05-02 19:06:40,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870866033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:40,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:40,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 19:06:40,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323555633] [2021-05-02 19:06:40,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:06:40,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:40,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:06:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:06:40,220 INFO L87 Difference]: Start difference. First operand 1414 states and 1522 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:40,405 INFO L93 Difference]: Finished difference Result 1693 states and 1822 transitions. [2021-05-02 19:06:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:06:40,406 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1413 [2021-05-02 19:06:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:40,409 INFO L225 Difference]: With dead ends: 1693 [2021-05-02 19:06:40,409 INFO L226 Difference]: Without dead ends: 1693 [2021-05-02 19:06:40,410 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 1428 GetRequests, 1414 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:06:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-05-02 19:06:40,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1693. [2021-05-02 19:06:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1693 states, 1689 states have (on average 1.0769686204854945) internal successors, (1819), 1689 states have internal predecessors, (1819), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1693 states to 1693 states and 1822 transitions. [2021-05-02 19:06:40,426 INFO L78 Accepts]: Start accepts. Automaton has 1693 states and 1822 transitions. Word has length 1413 [2021-05-02 19:06:40,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:40,427 INFO L480 AbstractCegarLoop]: Abstraction has 1693 states and 1822 transitions. [2021-05-02 19:06:40,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 9 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1693 states and 1822 transitions. [2021-05-02 19:06:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1693 [2021-05-02 19:06:40,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:06:40,444 INFO L523 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:06:40,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:40,664 INFO L428 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:06:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:06:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash -835589572, now seen corresponding path program 15 times [2021-05-02 19:06:40,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:06:40,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869496118] [2021-05-02 19:06:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:06:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:41,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:06:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:06:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2021-05-02 19:06:41,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:06:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869496118] [2021-05-02 19:06:41,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869496118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801714760] [2021-05-02 19:06:41,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:41,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-05-02 19:06:41,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:06:41,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 19:06:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:06:43,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:43,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:43,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:43,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:06:43,810 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242351 proven. 1347 refuted. 0 times theorem prover too weak. 265345 trivial. 0 not checked. [2021-05-02 19:06:43,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801714760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:06:43,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 19:06:43,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 21] total 26 [2021-05-02 19:06:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328564852] [2021-05-02 19:06:43,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 19:06:43,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:06:43,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 19:06:43,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-05-02 19:06:43,813 INFO L87 Difference]: Start difference. First operand 1693 states and 1822 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:06:47,854 INFO L93 Difference]: Finished difference Result 2813 states and 2968 transitions. [2021-05-02 19:06:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 19:06:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1692 [2021-05-02 19:06:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:06:47,856 INFO L225 Difference]: With dead ends: 2813 [2021-05-02 19:06:47,856 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:06:47,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 1781 GetRequests, 1675 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 3786.5ms TimeCoverageRelationStatistics Valid=1006, Invalid=10550, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 19:06:47,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:06:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:06:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 19:06:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:06:47,859 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1692 [2021-05-02 19:06:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:06:47,859 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:06:47,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 25 states have internal predecessors, (108), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:06:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:06:47,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:06:48,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:06:48,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:06:48 BasicIcfg [2021-05-02 19:06:48,064 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:06:48,065 INFO L168 Benchmark]: Toolchain (without parser) took 22718.30 ms. Allocated memory was 205.5 MB in the beginning and 660.6 MB in the end (delta: 455.1 MB). Free memory was 170.2 MB in the beginning and 428.0 MB in the end (delta: -257.8 MB). Peak memory consumption was 198.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: CACSL2BoogieTranslator took 123.42 ms. Allocated memory is still 205.5 MB. Free memory was 170.0 MB in the beginning and 160.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: Boogie Preprocessor took 76.07 ms. Allocated memory is still 205.5 MB. Free memory was 160.7 MB in the beginning and 188.9 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: RCFGBuilder took 206.95 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 173.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: IcfgTransformer took 13.74 ms. Allocated memory is still 205.5 MB. Free memory was 173.6 MB in the beginning and 172.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L168 Benchmark]: TraceAbstraction took 22293.12 ms. Allocated memory was 205.5 MB in the beginning and 660.6 MB in the end (delta: 455.1 MB). Free memory was 172.1 MB in the beginning and 428.0 MB in the end (delta: -255.9 MB). Peak memory consumption was 200.2 MB. Max. memory is 8.0 GB. [2021-05-02 19:06:48,065 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 205.5 MB. Free memory is still 186.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 123.42 ms. Allocated memory is still 205.5 MB. Free memory was 170.0 MB in the beginning and 160.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.07 ms. Allocated memory is still 205.5 MB. Free memory was 160.7 MB in the beginning and 188.9 MB in the end (delta: -28.1 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 206.95 ms. Allocated memory is still 205.5 MB. Free memory was 188.9 MB in the beginning and 173.6 MB in the end (delta: 15.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 13.74 ms. Allocated memory is still 205.5 MB. Free memory was 173.6 MB in the beginning and 172.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 22293.12 ms. Allocated memory was 205.5 MB in the beginning and 660.6 MB in the end (delta: 455.1 MB). Free memory was 172.1 MB in the beginning and 428.0 MB in the end (delta: -255.9 MB). Peak memory consumption was 200.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22225.6ms, OverallIterations: 20, TraceHistogramMax: 648, EmptinessCheckTime: 69.3ms, AutomataDifference: 6808.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 344 SDtfs, 1582 SDslu, 329 SDs, 0 SdLazy, 1869 SolverSat, 374 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1099.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6877 GetRequests, 6581 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4420 ImplicationChecksByTransitivity, 6040.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1693occurred in iteration=19, InterpolantAutomatonStates: 233, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 139.7ms AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 572.5ms SsaConstructionTime, 2289.5ms SatisfiabilityAnalysisTime, 8421.3ms InterpolantComputationTime, 13197 NumberOfCodeBlocks, 11739 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13162 ConstructedInterpolants, 0 QuantifiedInterpolants, 25896 SizeOfPredicates, 4 NumberOfNonLiveVariables, 9147 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 1933892/2423578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...